| First Indicator Undefined # - Undefined |
Second Indicator Undefined # - Undefined |
| Subfield Codes $a - Authentication code (R) |
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One or more authentication codes assigned by centers that review and upgrade, if necessary, an authority record in a national database. Codes have not been defined.
When defined, the authentication codes will be compatible with those used in other cooperative projects.
| (03/14/2008) | Contact Us |