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Copyright Statement |
SilverPlatter Guides AN Accession Number (a limit field)
1999-18045 in an 91-01204 in an an=95-03694
The AN field contains a unique identifying number for each record in the Derwent Biotechnology Abstracts database. The accession number contains a four-digit year (YYYY-NNNNN) in records added to the database from September, 1999 forward, and a two-digit year (YY-NNNNN) in records added prior to that date.
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