Rovsing Olsen, P. (1969). Duo: For accordion and piano op. 56 / Poul Rovsing Olsen. Hohner.
Cita Chicago Style (17a ed.)Rovsing Olsen, Poul. Duo: For Accordion and Piano Op. 56 / Poul Rovsing Olsen. Trossingen: Hohner, 1969.
Cita MLA (8a ed.)Rovsing Olsen, Poul. Duo: For Accordion and Piano Op. 56 / Poul Rovsing Olsen. Hohner, 1969.
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