TY  - MUSIC
AU  - Flesch,Carl
AU  - Karman,Charlotte
TI  - Scale system : : scale exercises in all major and minor keys for daily study / 
PY  - 1942///
CY  - New York : 
PB  - C. Fischer, 
KW  - Viola-
KW  - Estudis i exercicis
ER  -