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1
[Cincinnati] : The Center, 1967

Book
2
by Baer, Charles H. (Charles Henry), 1919-
[Place of publication not identified] : [publisher not identified], 1964

Book
3
Durham, N.C. : U.S. Dept. of Health, Education and Welfare, Public Health Service, Consumer Protection and Environmental Health Service, National Air Pollution Control Administration, 1969

Government Document Conference Proceeding Book
4
Rockville, Md. : U.S. Dept. of Health, Education and Welfare, Public Health Service, Environmental Health Service, National Air Pollution Control Administration, 1970

Conference Proceeding Book