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042 - AUTHENTICATION CODE (NR)
One or more codes that indicate an authentication center has reviewed a national database record. The codes are associated with specifically designated authentication agencies.
Indicators
- First - Undefined
- # - Undefined
- Second - Undefined
- # - Undefined
Subfield Code
- $a - Authentication code (R)
A code assigned by the authentication center to indicate that the record has been reviewed in a specific way.
Code from: MARC Code Lists for Relators Sources Description Conventions

