Guidelines for Usage: 09X Local Call Numbers

NACO LSP Usage:

LC has implemented field 090 in the 09X block. Field 090 may contain an LC-style call number, a Dewey Decimal number, or some other system of classification used by an LSP participant. It should not contain Library of Congress call numbers assigned by LC. Field 050 is used for such numbers. Only the NACO library creating the authority record may use field 090.

LC Usage:

LC does not use field 090.

For more information on LC Guidelines, select:

Guidelines for Usage: NACO/LSP and LC