http://dewey.info/scheme/edition/e23/ en
371.21 Admissions and related topics
371.219 School enrollment
371.21909 History and biography
http://dewey.info/scheme/edition/e22/ de
371.21 Zulassungen und verwandte Themen
371.219 Einschreibungsrate
371.21909 Geschichte und Biografien
Dewey Decimal Classification
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