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1
Conference proceedings: pollution of Lake Erie and its tributaries, third session, Buffalo, New York, March 22, 1967.
[Washington] Federal Water Pollution Control Administration, U.S. Dept. of the Interior 1967

Government Document Conference Proceeding Book
2
Conference proceedings : pollution of Lake Erie and its tributaries, fourth session : Cleveland, Ohio, October 4, 1968.
[Washington, D.C.] : [U.S. Dept. of the Interior, Federal Water Pollution Control Administration], 1968

Government Document Conference Proceeding Book
3
Conference proceedings.
[Washington] Federal Water Pollution Control Administration, U.S. Dept. of the Interior 1967

Conference Proceeding Book
4
Conference proceedings : pollution of Lake Erie and its tributaries, fourth session : Cleveland, Ohio, October 4, 1968.
Washington, D.C. : United States Government Printing Office, 1968

Government Document Conference Proceeding Book
5
Proceedings.
[Washington] : Federal Water Pollution Control Administration, 1969

Government Document Conference Proceeding Book
6
Proceedings.
[Washington] Federal Water Pollution Control Administration 1966

Government Document Conference Proceeding Book
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