TY  - BOOK
TI  - Environmental control seminar proceedings, Rotterdam, Warsaw, Bucharest, May 25-June 4, 1971
U1  - 628.51 ENV  
PY  - 1971///
CY  - Washington
PB  - Bureau of International Commerce; for sale by the Supt. of Docs., U.S. Govt. Print. Off.
KW  - Environmental engineering
KW  - Water
KW  - Air
N1  - "A United States Department of Commerce publication."
ER  -