http://dewey.info/scheme/edition/e23/ en
785.6 Keyboard, mechanical, aeolian, electrophone, percussion ensembles
785.66 Ensembles of mechanical and aeolian instruments
785.669 Aeolian ensembles
http://dewey.info/scheme/edition/e22/ de
785.6 Ensembles aus Tasten-, Schlaginstrumenten, mechanischen, äolischen, elektronischen Instrumenten
785.66 Ensembles aus mechanischen und äolischen Instrumenten    Ensembles aus mechanischen Instrumenten
785.669 Ensembles aus äolischen Instrumenten
Dewey Decimal Classification
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