. . . . . . . . "Federal water pollution control : Hearings before the Committee on Public Works, House of Representatives, Eighty-seventh Congress, first session, on H. R. 4036, to amend the Federal water pollution control act" . . "Federal water pollution control: hearings before the Committee on Public Works, House of Representatives, Eighty-seventh Congress, first session, on H.R. 4036, to amend the Federal water pollution control act" . .