Edition Peters Wohlfahrt 60 Etüden Viola, Classical Sheet Music for Viola, Franz Wohlfahrt: 60 Etudes Op. 45 for viola, Arranged by Fritz Spindler, Intermediate level of difficulty, ISBN 9790014015589, ISMN 9790014074067, publisher's no. EP 9166, Format: 23 x 30.5 cm, 53 Pages