Music Instruction: General in 1972

Fingerpower - Level 6: Effective Technic for All Piano Methods by Schaum, John W.

Piano Music of Robert Schumann, Series II by Schumann, Robert

Basic Principles in Pianoforte Playing by Lhevinne, Josef

Piano Technique by Gieseking, Walter, Leimer, Karl

The Painful Plough by Palmer, Roy