http://dewey.info/scheme/edition/e23/ en
613.6 Personal safety and special topics of health
613.62 Industrial and occupational health
http://dewey.info/scheme/edition/e22/ de
613.6 Persönliche Sicherheit und spezielle Gesundheitsthemen
613.62 Betriebs- und Arbeitssicherheit
Dewey Decimal Classification
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