Water Pollution Control: Hearings Before the Committee on Public Works, House of Representatives, Eightieth Congress, First Session, on H.R. 123, H.R. 315, H.R. 470, Bills to Provide for Water-pollution-control Activities in the United States Public Health Service, and for Other Purposes, June 11, 12, 13, and 16, 1947
United States. Congress. House. Committee on Public Works
jan. de 1947 · U.S. Government Printing Office