Changes

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= 022 International Standard Serial Number =
 
= 022 International Standard Serial Number =
PFAN series practice:
+
'''PFAN series practice:'''Transcription of the series statement is mandatory if applicable. Searching for series authority records, tracing the series, and the creation and maintenance of series authority records are optional.
Transcription of the series statement is mandatory if applicable. Searching for series authority records, tracing the series, and the creation and maintenance of series authority records
  −
are optional.
      
Record the ISSN whenever it is available from the item in hand, from analytic bibliographic records, or from the collected set bibliographic record for the series; otherwise, recording the ISSN is optional.
 
Record the ISSN whenever it is available from the item in hand, from analytic bibliographic records, or from the collected set bibliographic record for the series; otherwise, recording the ISSN is optional.
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667 $a Version en ligne : ISSN YYYY-ZZZZ
 
667 $a Version en ligne : ISSN YYYY-ZZZZ
 
</pre>
 
</pre>
      
When the title of a publication has changed, confirm that an ISSN appearing on the publication belongs to the new title and not to the earlier title.
 
When the title of a publication has changed, confirm that an ISSN appearing on the publication belongs to the new title and not to the earlier title.