http://dewey.info/scheme/edition/e23/ en
812.54 American drama--1945-1999
812.5409 American drama--1945-1999--history and criticism
812.54099287 American drama--women authors--1945-1999--history and criticism
http://dewey.info/scheme/edition/e22/ de
812.54 Amerikanische Dramen--1945–1999, . . .
812.5409 Amerikanische Dramen--1945–1999--Geschichte und Literaturwissenschaft
812.54099287 Amerikanische Dramen--Autorinnen--1945–1999--Geschichte und Literaturwissenschaft
Dewey Decimal Classification
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