Official Book of Scales, Broken Chords and Exercises ... Pianoforte.
LONDON. - Associated Board of the Royal Schools of Music.
Some years contain several grades, but not all are complete ; [1921] ; [1933] ; [1942] ; [1947] ; [1948] ; [1950] 6 bk ; [1959] 8 bk ; [1964.] 8 bk