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>file-write-date | Common Lisp Nova Spec</TITLE
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><A HREF="index.html"
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>Common Lisp Nova Spec</A
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> <SPAN CLASS="breadcrumb-item"
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>→ <A HREF="20_Files.html"
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>20. Files</A
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> <SPAN CLASS="breadcrumb-item"
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>→ <A HREF="f_file-write-date.html"
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>file-write-date</A
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><SPAN ID="apropos-label"
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>Apropos </SPAN
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><INPUT ID="apropos" AUTOFOCUS="AUTOFOCUS" PLACEHOLDER="Type here to search" ONINPUT="aproposInput(this);" ONKEYUP="aproposKeyup(event);" ONCHANGE="aproposChange(this);" ONFOCUS="aproposFocus(this);" ONFOCUSOUT="aproposFocusout(this);"
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><DIV CLASS="matter"
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><TABLE WIDTH="100%" CELLSPACING="0" CELLPADDING="0"
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><TD ALIGN="LEFT" VALIGN="BASELINE" WIDTH="100%" CLASS="name"
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><SPAN CLASS="idx" DATA-KIND="idxref" DATA-TERM="file-write-date"
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></SPAN
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><B
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>file-write-date</B
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></TD
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><TD ALIGN="RIGHT" VALIGN="BASELINE" WIDTH="0" NOWRAP="NOWRAP" CLASS="ftype"
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><I
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>Function</I
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></TD
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></TR
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></TABLE
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><HR
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></DIV
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><UL CLASS="subtoc"
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></UL
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><DL
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><DT
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><B
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>Syntax</B
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></DT
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><DD
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><P CLASS="j"
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><B
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>file-write-date</B
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> <SPAN CLASS="cmssi"
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>pathspec</SPAN
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> <SPAN CLASS="arrow"
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>→</SPAN
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> <SPAN CLASS="cmssi"
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>date</SPAN
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></P
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></DD
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><DT
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><B
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>Arguments and Values</B
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></DT
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><DD
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><P CLASS="j"
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><VAR CLASS="param"
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>pathspec</VAR
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> — a <A HREF="26_1_Glossary.html#pathname_designator"
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><EM CLASS="term"
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>pathname designator</EM
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></A
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>. </P
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><P CLASS="j"
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><VAR CLASS="param"
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>date</VAR
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> — a <A HREF="26_1_Glossary.html#universal_time"
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><EM CLASS="term"
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>universal time</EM
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></A
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> or <SPAN CLASS="misc"
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><B
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>nil</B
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></SPAN
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>.</P
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></DD
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><DT
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><B
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>Description</B
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></DT
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><DD
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><P CLASS="j"
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>Returns a <A HREF="26_1_Glossary.html#universal_time"
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><EM CLASS="term"
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>universal time</EM
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></A
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> representing the time at which the <A HREF="26_1_Glossary.html#file"
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><EM CLASS="term"
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>file</EM
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></A
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> specified by <VAR CLASS="param"
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>pathspec</VAR
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> was last written (or created), or returns <SPAN CLASS="misc"
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><B
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>nil</B
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></SPAN
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> if such a time cannot be determined.</P
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></DD
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><DT
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><B
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>Examples</B
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></DT
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><DD
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><PRE CLASS="screen"
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> (with-open-file (s "noel.text"
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:direction :output :if-exists :error)
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(format s "~&Dear Santa,~2%I was good this year. ~
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Please leave lots of toys.~2%Love, Sue~
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~2%attachments: milk, cookies~%")
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(truename s))
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<SPAN CLASS="cmsy"
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><SPAN CLASS="arrow"
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>→</SPAN
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></SPAN
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> #P"CUPID:/susan/noel.text"
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(with-open-file (s "noel.text")
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(file-write-date s))
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<SPAN CLASS="cmsy"
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><SPAN CLASS="arrow"
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>→</SPAN
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></SPAN
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> 2902600800</PRE
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></DD
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><DT
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><B
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>Affected By</B
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></DT
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><DD
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><P CLASS="j"
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>The host computer’s file system.</P
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></DD
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><DT
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><B
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>Exceptional Situations</B
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></DT
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><DD
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><P CLASS="j"
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>An error of <A HREF="26_1_Glossary.html#type"
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><EM CLASS="term"
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>type</EM
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></A
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> <A HREF="t_file-error.html" CLASS="typeref"
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><B
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>file-error</B
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></A
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> is signaled if <VAR CLASS="param"
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>pathspec</VAR
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> is <A HREF="26_1_Glossary.html#wild"
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><EM CLASS="term"
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>wild</EM
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></A
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>. </P
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><P CLASS="j"
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>An error of <A HREF="26_1_Glossary.html#type"
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><EM CLASS="term"
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>type</EM
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></A
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> <A HREF="t_file-error.html" CLASS="typeref"
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><B
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>file-error</B
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></A
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> is signaled if the <A HREF="26_1_Glossary.html#file_system"
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><EM CLASS="term"
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>file system</EM
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></A
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> cannot perform the requested operation.</P
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></DD
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><DT
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><B
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>See Also</B
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></DT
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><DD
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><P CLASS="j"
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><A HREF="25_1_The_External_Environment.html#sec_25_1_4_2" CLASS="secref"
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><SPAN CLASS="cmr"
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>Section</SPAN
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> <SPAN CLASS="cmr"
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>25.1.4.2</SPAN
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> <SPAN CLASS="cmr"
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>(Universal</SPAN
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> <SPAN CLASS="cmr"
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>Time)</SPAN
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></A
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>, <A HREF="19_1_Overview_of_Filenames.html#sec_19_1_2" CLASS="secref"
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><SPAN CLASS="cmr"
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>Section</SPAN
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> <SPAN CLASS="cmr"
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>19.1.2</SPAN
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> <SPAN CLASS="cmr"
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>(Pathnames</SPAN
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> <SPAN CLASS="cmr"
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>as</SPAN
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> <SPAN CLASS="cmr"
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>Filenames)</SPAN
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></A
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></P
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></DD
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></DL
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></DIV
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></DIV
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><DIV CLASS="footer"
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><DIV CLASS="btmnav"
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><A HREF="f_file-author.html" CLASS="prev"
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>←</A
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>→</A
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><DIV CLASS="trail"
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>Conversion to HTML copyright 2023 by Gilbert Baumann</DIV
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