LC Guidelines: 680 Public General Note
NACO:
Do not use this field.
SACO:
Do not use subfields: $5, $6, $8
LC:
NAMES/SERIES:
Do not use this field.
SUBJECTS:
Do not use subfields: $5, $6, $8
Local Subfield Code:
$9 - Local field-level nonprint flag [SUBJECTS only]
Use local subfield $9 to control the printing of the field in output products.
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