TY  - MUSIC
AU  - Kayser,Heinrich Ernst
TI  - 36 Elementary and progressive etudes:  : Op. 20
PY  - 1955///
CY  - New York
PB  -  : Carl Fischer
KW  - Viola
KW  - Estudis i exercicis
KW  - Partitures
N1  - Per a viola
ER  -