Current Sources
CODEN assigned till 1966 can be looked up at the two-volume CODEN for periodical titles issued by L.E. Kuentzel. CODEN assigned till 1974 were published by J.G. Blumenthal. CODEN assigned till 1998 and their disintegration can be found at the International CODEN Directory (ISSN 0364-3670), which has been published since 1980 as a microfiches issue.
Finding a current CODEN is now best done with the online database of CASSI (Chemical Abstracts Service Source Index), covering all registered titles, CODEN, ISSN, ISBN, abbreviations for publications indexed by CAS since 1907, including serial and non-serial scientific and technical publications: .
CASSI online is the replacement for CASSI als printed serial issue (ISSN 0738-6222, CODEN CASSE2), or as the Collective Index (0001-0634, CODEN CASSI6). CASSI will no longer be published in print. Only the CD-ROM issue of CASSI (ISSN 1081-1990, CODEN CACDFE) will be published furthermore.
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