Monographic component part:

A monographic bibliographic unit that is physically attached to or contained in another unit such that the retrieval of the component part is dependent on the identification and location of the host item(See Glossary) or container.  Examples of monographic component parts with corresponding host items include an article in a single issue of a periodical, a chapter in a book, a band on a phonodisc, and a map on a single sheet that contains several maps.  The bibliographic record for a component part contains fields that describe the component part and data that identify the host, field 773 (Host Item Entry).

Code a in Leader/07 indicates that the bibliographic level of the record is monographic component part.

See also:

773  Host Item Entry