http://dewey.info/scheme/a14/ en
551.09 Historical, geographic, persons treatment of geology
551.092 Geologists
http://dewey.info/scheme/a14/ vi
551.09 Lịch sử, địa lý, con người của địa chất học
551.092 Nhà địa chất học
http://dewey.info/scheme/a14/ it
551.09 Storia, geografia, persone della geologia
551.092 Geologi
http://dewey.info/scheme/edition/e23/ en
551.09 History, geographic treatment, biography of geology
551.092 Geologists
http://dewey.info/scheme/edition/e22/ de
551.09 Geschichte, geografische Behandlung, Biografien der Geologie
551.092 Geologen
Dewey Decimal Classification
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