Coal mine health and safety.
Hearings, Ninety-first Congress, first session.

APA Citation

United States. Congress. House. Committee on Education and Labor. General Subcommittee on Labor. (1969). Coal mine health and safety: Hearings, Ninety-first Congress, first session. Washington: U.S. Govt. Print. Off..

MLA Citation

United States. Congress. House. Committee on Education and Labor. General Subcommittee on Labor. Coal Mine Health And Safety: Hearings, Ninety-first Congress, First Session. Washington: U.S. Govt. Print. Off., 1969.

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