Do not apply the code "dcrmb" to records for resources cataloged according to the collection-level guidelines found in Appendix B.  The fact that such records contain collection-level descriptions is indicated by the value c assigned in the Bibliographic level (Leader/07).  The guidelines in Appendix B suggest factors to consider in constructing collection-level records for rare materials and provide examples useful in a special collections context.  However, the conventions conform substantially to those governing standard collection-level descriptions, as presented in Cataloging Service Bulletin, no. 78 (Fall 1997).

See also:

Appendix A:  MARC 21 Descriptive Conventions Code