http://dewey.info/scheme/a14/ en
907 Education, research, related topics of history
907.2 Historical research
http://dewey.info/scheme/edition/e23/ en
907 Education, research, related topics of history
907.2 Historical research
907.202 Historians
http://dewey.info/scheme/edition/e22/ de
907 Ausbildung, Forschung, verwandte Themen der Geschichtswissenschaft
907.2 Historische Forschung
907.202 Historiker, . . .
Dewey Decimal Classification
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