Skornicka, J. E., & Boltz, E. (1939). Rubank intermediate method: [for] Eb or BBb bass : a follow-up course for individual or like-instrument class instruction. Ill. Rubank.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSkornicka, Joseph E., और E.G Boltz. Rubank Intermediate Method: [for] Eb or BBb Bass : A Follow-up Course for Individual or Like-instrument Class Instruction. Chicago: Ill. Rubank, 1939.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSkornicka, Joseph E., और E.G Boltz. Rubank Intermediate Method: [for] Eb or BBb Bass : A Follow-up Course for Individual or Like-instrument Class Instruction. Ill. Rubank, 1939.
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