This section has guidelines for cataloging supplementary items. Use the publication pattern to determine whether the supplementary item should be cataloged as a monograph or a serial.
Monographs have a finite number of parts.
Serials are intended to continue indefinitely. You may create a record for both the main work and its supplement. Such records are not duplicates. Treat subsequent parts that update the item, have different titles, and are issued indefinitely as serials. Supplements to looseleaf publications that are cataloged as serials may be cataloged separately as another serial in a separate record, particularly if the supplement has a separate title.