Guidelines for Usage: 020 International Standard Book Number

NACO LSP Usage:

LC NACO must be consulted before subfield $c (Terms of availability) or $z (Canceled/invalid ISBN) are used in an authority record.

Do not use subfield $6 (Linkage). It has not been implemented in the LC system.

LC Usage:

LC does not use this field.

For more information on LC Guidelines, select:

Guidelines for Usage: NACO/LSP and LC