371.33 Teaching aids, equipment, materials
371.333 Audio materials and equipment
371.3331 Radio 371.3332 Sound recordings and their players de
371.33 Unterrichtsmittel, Ausstattung, Materialien
371.333 Audiomaterialien und Audioausstattung
371.3331 Hörfunk 371.3332 Tonaufzeichungen und deren Abspielgeräte
Dewey Decimal Classification
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