Guidelines for Usage: 450 See From Tracing - Topical Term

NACO LSP Usage:

Do not use this field. Subject authority records are not within the scope of the present NACO LSP program.

LC Usage:

LC usage for the following subfield codes in field 450 is given in LC Guidelines: Tracing and Reference Fields :

$i - Reference instruction phrase

$w - Control subfield

For more information on LC Guidelines, select:

Guidelines for Usage: NACO/LSP and LC