http://dewey.info/scheme/a14/ en
783 Music for single voices    The voice
783.9 Other types of voice
http://dewey.info/scheme/a14/ vi
783 Nhạc cho đơn ca    Giọng ca
783.9 Các loại giọng khác
http://dewey.info/scheme/a14/ it
783 Musica per voci singole    La voce
783.9 Altri tipi di voce
http://dewey.info/scheme/edition/e23/ en
783 Music for single voices
783.9 Other types of voice
783.96 Speaking voice 783.97 Sprechgesang 783.98 Whistle 783.99 Voice instruments
Dewey Decimal Classification
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