Water pollution, 1967.
Hearings, Ninetieth Congress, first session. April 25 and 26, 1967.

APA Citation

United States. Congress. House. Committee on Public Works. Subcommittee on Rivers and Harbors. (1967). Water pollution, 1967: Hearings, Ninetieth Congress, first session. April 25 and 26, 1967. Washington: U.S. Govt. Print. Off..

MLA Citation

United States. Congress. House. Committee on Public Works. Subcommittee on Rivers and Harbors. Water Pollution, 1967: Hearings, Ninetieth Congress, First Session. April 25 And 26, 1967. Washington: U.S. Govt. Print. Off., 1967.

Warning: These citations may not always be complete (especially for serials).