List of MARC 21 fields for holdings data Revision as of 10:23, 22 July 2015 by RachelDankert (talk | contribs) (added 856)(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff) This article is currently a draft. This is a guide page with links to cataloging instructions entered by their corresponding MARC fields MARC 583 Action Note MARC 856 Electronic Location and Access MARC 852 Location MARC 866 Textual Holdings--Basic Bibliographic Unit Categories: CatalogingStaff policies and procedures