http://dewey.info/scheme/edition/e23/ en
591.5 Behavior
591.51 General topics in behavior
591.512 Instinct 591.513 Intelligence 591.514 Learning 591.518 Nocturnal behavior 591.519 Sleep
http://dewey.info/scheme/edition/e22/ de
591.5 Verhalten
591.51 Allgemeine Themen zum Verhalten
591.512 Instinkt 591.513 Intelligenz 591.514 Lernen 591.518 N├Ąchtliches Verhalten 591.519 Schlaf
Dewey Decimal Classification
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