http://dewey.info/scheme/edition/e23/ en
530.8 Measurement
530.81 Physical units and constants
530.812 Metric system (Système international, SI) 530.813 British system
http://dewey.info/scheme/edition/e22/ de
530.8 Messen
530.81 Physikalische Einheiten und Konstanten
530.812 Metrisches System (Système international, SI) 530.813 Britisches System
Dewey Decimal Classification
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