APA

United States, . (1969). Benefits to employees in the mining industry: Hearings, Ninety-first Congress, first session, on H.R. 11476. Washington: U.S. Govt. Print. Off.

Chicago

United States, . 1969. Benefits to employees in the mining industry: Hearings, Ninety-first Congress, first session, on H.R. 11476. Washington: U.S. Govt. Print. Off.

Harvard

United States, . (1969). Benefits to employees in the mining industry: Hearings, Ninety-first Congress, first session, on H.R. 11476. Washington: U.S. Govt. Print. Off.

MLA

United States, . Benefits to employees in the mining industry: Hearings, Ninety-first Congress, first session, on H.R. 11476. Washington: U.S. Govt. Print. Off. 1969.