TY  - BOOK
AU  - Simmons, W.R.
AU  - Wescott,J.W.
AU  - Hall,F.F.
ED  - United States.
TI  - NOAA technical report ERL 216 - WPL 17: acoustic echo sounding as related to air pollution in urban environments
U1  - 621.3893 
PY  - 1971///
CY  - Washington
PB  - United States Dept. of Commerce
KW  - Sound recording
KW  - Sound Technology
ER  -