Pischna, J. (1967). Technical studies sixty progressive exercises, containing studies on trills, scales, chords, passages and arpeggios for the piano. G. Schirmer.

Pischna, Johann. Technical Studies Sixty Progressive Exercises, Containing Studies on Trills, Scales, Chords, Passages and Arpeggios for the Piano. Milwaukee: G. Schirmer, 1967.

Pischna, Johann. Technical Studies Sixty Progressive Exercises, Containing Studies on Trills, Scales, Chords, Passages and Arpeggios for the Piano. G. Schirmer, 1967.