APA

United States, . (1971). Three Sisters Wilderness, Oreg: hearings before Subcommittee on Minerals, Materials, and Fuels, 92d Congress, 1st session, on S. 1784, Sept. 13 and 14, 1971. [Washington, D.C.]: .

Chicago

United States, . 1971. Three Sisters Wilderness, Oreg: hearings before Subcommittee on Minerals, Materials, and Fuels, 92d Congress, 1st session, on S. 1784, Sept. 13 and 14, 1971. [Washington, D.C.]: .

Harvard

United States, . (1971). Three Sisters Wilderness, Oreg: hearings before Subcommittee on Minerals, Materials, and Fuels, 92d Congress, 1st session, on S. 1784, Sept. 13 and 14, 1971. [Washington, D.C.]: .

MLA

United States, . Three Sisters Wilderness, Oreg: hearings before Subcommittee on Minerals, Materials, and Fuels, 92d Congress, 1st session, on S. 1784, Sept. 13 and 14, 1971. [Washington, D.C.]: . 1971.