Raph, A.: The Double Valve Bass Trombone
Tax included.
A method for Bass Trombone with Single Valve in F, Double Valve in Eb, Double Valve in D and "Independent" 2nd Valve in Gb.
A method for Bass Trombone with Single Valve in F, Double Valve in Eb, Double Valve in D and "Independent" 2nd Valve in Gb.