APA

United States, . (1970). Underground uses of nuclear energy: Hearings, Ninety-first Congress, first [and second] session[s] on S. 3042. Washington: U.S. Govt. Print. Off.

Chicago

United States, . 1970. Underground uses of nuclear energy: Hearings, Ninety-first Congress, first [and second] session[s] on S. 3042. Washington: U.S. Govt. Print. Off.

Harvard

United States, . (1970). Underground uses of nuclear energy: Hearings, Ninety-first Congress, first [and second] session[s] on S. 3042. Washington: U.S. Govt. Print. Off.

MLA

United States, . Underground uses of nuclear energy: Hearings, Ninety-first Congress, first [and second] session[s] on S. 3042. Washington: U.S. Govt. Print. Off. 1970.