LC Guidelines: 008/11 Subject heading system/thesaurus
NACO:
Use code n in reference records (008/09, Kind of record, code b or c) and in records when the 1XX is not appropriate for use as a subject heading.
Do not use codes: b, c, d, k, r, s, v, z, fill character ( | )
SACO:
Do not use codes: c, d, k, r, s, v, z, fill character ( | )
LC:
NAMES/SERIES:
Use code n in reference records (008/09, Kind of record, code b or c) and in records when the 1XX is not appropriate for use as a subject heading.
Do not use codes: b, c, d, k, r, s, v, z, fill character ( | )
SUBJECTS:
Do not use codes: c, d, k, r, s, v, z, fill character ( | )
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