TY  - BOOK
AU  - Schmidt, Helmut
TI  - Schalltechnisches Taschenbuch 
SN  - 3184008606
U1  - 620.2 
PY  - 1989///
CY  - Dusseldorf : 
PB  - VDI Verlag GmbH, 
KW  - Acoustical Engineering
N1  - NY
UR  - https://eaklibrary.neduet.edu.pk:8443/catalog/bk/books/toc/3-18-400860-6.pdf
ER  -