TY  - BOOK
AU  - Lang Paul Henry
TI  - Problems of modern music
AV  - HT151 .D3 
U1  - 323.3520973  
PY  - 1960///.
CY  - New York, London
PB  - Norton and company, Chapman & Hall
KW  - 樂
KW  - United States
KW  - Social conditions.
ER  -