http://dewey.info/scheme/edition/e23/ en
891.7 Russian literature and related East Slavic literatures
891.72 Russian drama
891.723 Russian drama--1800-1917 891.7242 Russian drama--1917-1945 891.7244 Russian drama--1945-1991
http://dewey.info/scheme/edition/e22/ de
891.7 Russische Literatur und verwandte ostslawische Literaturen
891.72 Russische Dramen
891.723 Russische Dramen--1800–1917 891.7242 Russische Dramen--1917–1945 891.7244 Russische Dramen--1945–1991
Dewey Decimal Classification
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