http://dewey.info/scheme/a14/ en
540 Chemistry and allied sciences
540.1 Philosophy and theory
http://dewey.info/scheme/a14/ vi
540 Hoá học và khoa học liên quan
540.1 Triết học và lý thuyết
http://dewey.info/scheme/a14/ it
540 Chimica e scienze connesse
540.1 Filosofia e teoria
http://dewey.info/scheme/edition/e23/ en
540 Chemistry and allied sciences
540.1 Philosophy and theory
540.11 Alchemy and systems
http://dewey.info/scheme/edition/e22/ de
540 Chemie und zugeordnete Wissenschaften
540.1 Philosophie und Theorie
540.11 Alchemie und Systeme
Dewey Decimal Classification
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