Fourth grade etudes
Subtitle: twenty-four progressive studies in all major and minor keys from the works of Berens, Bertini, Cramer, Czerny, Gurlitt, Heller, Leybach, Löschhorn and John Thompson : each containing preparatory exercises
By: by John Thompson
Publisher: The Willis Music Company
Published: 1941
Place of publication: Cincinnati, Ohio
Number of pages: 57
Notes: Avant titre: Supplementary material for use with John Thompson's modern course for the piano.

Voorwoord van John Thompson.