084 Subfield $2 - Source of number:

Subfield $2 contains a MARC code for the source of the classification system or scheme from which the number was assigned. The source of the code is MARC Code List for Relators, Sources, Description Conventions that is maintained by the Library of Congress.

Examples:

084 ##$a8501(043)$2rueskl

084 ##$aCA2 PQ C07 81P52$2cacodoc

[Number was assigned from the CODOC system.]