http://dewey.info/scheme/edition/e23/ en
612.8 Nervous system
612.85 Ears
612.851 External ears 612.854 Middle ears 612.858 Internal ears
http://dewey.info/scheme/edition/e22/ de
612.8 Nervensystem
612.85 Ohren
612.851 Äußere Ohren 612.854 Mittelohren 612.858 Innenohren
Dewey Decimal Classification
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