http://dewey.info/scheme/edition/e23/ en
420 English and Old English (Anglo-Saxon)
420.9 English language--history
420.971 Canadian language--English
http://dewey.info/scheme/edition/e22/ de
420 Englisch und Altenglisch (Angelsächsisch)
420.9 Englisch--Geschichte
420.971 Kanadische Sprache--Englisch,. . .
Dewey Decimal Classification
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