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54 Chemistry
546 Inorganic chemistry
546.2 Hydrogen and its compounds 546.3 Metals, metallic compounds, alloys 546.4 Group 3 546.5 Groups 4, 5, 6, 7 546.6 Groups 8, 9, 10, 11, 12, 13, 14 546.7 Groups 15, 16, 17, 18 546.8 Periodic law and periodic table
Dewey Decimal Classification
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