Voss, Charles Octaves : Op. 54 [Música impresa] / Ch. Voss - Paris : Alphonse Leduc , cop. 1912 - 5 p. ; 35 cm - Nouveau Gradus ad Parnassum . Études instructives ; No. 30 . Per a piano Publisher. No.: A. L. 14,821 Subjects--Topical Terms: Estudis i exercicisPianoPartitures Universal Decimal Class. No.: CONS pn Vos /1