TY  - BOOK
AU  - Beranek, Leo L Ed. by
TI  - Noise reduction 
PY  - 1960///
CY  - New York
PB  - Mc Graw - Hill
KW  - Noise control and reduction
N1  - This book was prepared from a series of lectures presented at a special summer program at the Massachusswets Institute of technology
ER  -