(1935). Rubank supplementary studies, trombone: To be used with or to follow any method.
Chicago-viite (17. p.)Rubank Supplementary Studies, Trombone: To Be Used with or to Follow Any Method. 1935.
MLA-viite (9. p.)Rubank Supplementary Studies, Trombone: To Be Used with or to Follow Any Method. 1935.
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