5 public-domain matches

Keyboard Harmony

Cover of Keyboard Harmony

Keyboard Harmony

George A. Wedge

Cover of Keyboard harmony and transposition

Keyboard harmony and transposition

Anna Heuermann-Hamilton

Cover of Keyboard training in harmony

Keyboard training in harmony

Arthur Edward Heacox

Cover of Harmony

Harmony

John Sir Stainer

United States patent 1549622

United States patent 1549622

Burnham C. Stickney