Library of Congress >> MARC >> Authority >> 01X-09X >> 042

042 - Authentication Code (NR)

MARC 21 Authority - Concise

One or more authentication codes indicating that the record, existing in a national database, has been reviewed in a specific way. The codes are associated with specifically designated authentication agencies.

First - Undefined
# - Undefined
Second - Undefined
# - Undefined
Subfield Codes
$a - Authentication code (R)
If more than one code is applicable, the subfield is repeated. Code from: MARC Authentication Action Code List.

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