Library of Congress >> MARC >> Authority >> National Level Requirements >> Tracing & Reference

MARC 21 Format for Authority Data

National Level Requirements

Tracing and Reference Fields

1999 Edition

Update No. 1 (October 2001) through Update No. 8 (October 2007)

The subfields below pertain to special subfields used with the 4XX and 5XX fields. For a complete listing of the subfields used for either the 4XX and 5XX fields, see their individual pages.


TRACING FIELDS
   $i  Reference instruction phrase                         A
   $w  Control subfield                                     A

Library of Congress >> MARC >> Authority >> National Level Requirements >> Tracing & Reference

(03/25/2008)