United States. Congress. Senate. Committee on the District of Columbia & ProQuest (Firm). (1970). Water pollution in the National Capital region: Hearings, Ninety-first Congress, second session .. U.S. Govt. Print. Off.
Chicago Style (17th ed.) CitationUnited States. Congress. Senate. Committee on the District of Columbia and ProQuest (Firm). Water Pollution in the National Capital Region: Hearings, Ninety-first Congress, Second Session .. Washington: U.S. Govt. Print. Off, 1970.
MLA (9th ed.) CitationUnited States. Congress. Senate. Committee on the District of Columbia and ProQuest (Firm). Water Pollution in the National Capital Region: Hearings, Ninety-first Congress, Second Session .. U.S. Govt. Print. Off, 1970.
Warning: These citations may not always be 100% accurate.