Skornicka, J. E., & Boltz, E. G. (1939). Eb or BBb Bass (Tuba): A follow up course for individual or like-instrument class instruction / J.E.Skornicka and E.G. Boltz. Rubank.
Citace podle Chicago (17th ed.)Skornicka, Joseph E., a E. G. Boltz. Eb or BBb Bass (Tuba): A Follow Up Course for Individual or Like-instrument Class Instruction / J.E.Skornicka and E.G. Boltz. Miami, Fl.: Rubank, 1939.
Citace podle MLA (8th ed.)Skornicka, Joseph E., a E. G. Boltz. Eb or BBb Bass (Tuba): A Follow Up Course for Individual or Like-instrument Class Instruction / J.E.Skornicka and E.G. Boltz. Rubank, 1939.
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