660 studies, op. 45, for viola solo60 studies, op. 45, for viola solode Franz WohlfahrtMateriasStudies and exercisesViolaEdiciones (1)60 studies, op. 45, for viola solo. (1961)International Music · inglésMás obras de Franz WohlfahrtSixty studies for violin, op. 45Forty elementary studies for the violinFifty easy melodious studies for the violin
