Raph, A. (1969). The Double Valve Bass Trombone: A method for trombone with single valve in F ; double valve in Eb ; double valve in D / by Alan Raph. Fischer.

Raph, Alan. The Double Valve Bass Trombone: A Method for Trombone with Single Valve in F ; Double Valve in Eb ; Double Valve in D / by Alan Raph. New York, NY [u.a.]: Fischer, 1969.

Raph, Alan. The Double Valve Bass Trombone: A Method for Trombone with Single Valve in F ; Double Valve in Eb ; Double Valve in D / by Alan Raph. Fischer, 1969.