http://dewey.info/scheme/a14/ en
540 Chemistry and allied sciences
540.92 Chemists
http://dewey.info/scheme/a14/ vi
540 Hoá học và khoa học liên quan
540.92 Nhà hoá học
http://dewey.info/scheme/a14/ it
540 Chimica e scienze connesse
540.92 Chimici
http://dewey.info/scheme/edition/e23/ en
540.9 Chemistry--history
540.92 Chemists
http://dewey.info/scheme/edition/e22/ de
540.9 Chemie—Geschichte
540.92 Chemiker
Dewey Decimal Classification
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