Long, N. H. (1960). Undercurrent [theme and variations]: For Bb bass clarinet with piano accompaniment. Rubank.
Chicago-viite (17. p.)Long, Newell H. Undercurrent [theme and Variations]: For Bb Bass Clarinet with Piano Accompaniment. Chicago: Rubank, 1960.
MLA-viite (9. p.)Long, Newell H. Undercurrent [theme and Variations]: For Bb Bass Clarinet with Piano Accompaniment. Rubank, 1960.
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