TY  - BOOK
ED  - United States.
TI  - Enverionmental reuirements and pollution tolerence of trichoptra
U1  - 363.73 
PY  - 1978///
CY  - Washington
PB  - U.S. Government Printing Office
KW  - Pollution
KW  - Environmental pollution
N1  - EPA-600/4-78-063
ER  -