042 AUTHENTICATION CODE (NR)
Indicators - Both undefined; each contains a blank (^)
Subfield Code $a Authentication code (R) dc - Dublin Core dhca - Dance Heritage Coalition Access Project gamma - Georgia Archives & Manuscripts Automated Access Project gils - Government Information Location Service isds/c - ISSN/Canada lc - Library of Congress lcac - LC Annotated Children's Cataloging Program lccopycat - LC copy cataloging lccopycat-nm - LC copy cataloging-Near Match lcd - CONSER full authority application lcderive - LC derived cataloging lchlas - LC Handbook of Latin American Studies lcllh - LC Law Library Hispanic lcnccp - LC National Coordinated Cataloging Program lcnitrate - LC nitrate film lcnuc - National Union Catalog lcode - LC overseas data entry msc - CONSER minimal authority application nlc - National Library of Canada nsdp - National Serial Data Program nst - New Serial Titles (SE) [OBSOLETE] ntccf - LC National Translations Center citation file pcc - Program for Cooperative Cataloging premarc - LC PreMARC Retrospective Conversion Project sanb - South African National Bibliography Project xisds/c - ISSN/Canada does not consider item a serial xlc - LC does not consider item a serial xnlc - NLC does not consider item a serial xnsdp - NSDP does not consider item a serial