APA

United States, . (1973). Regulation of surface mining: hearings before Subcommittee on Environment and Subcommittee on Mines and Mining, 93d Congress, 1st session, H.R. 3 and related bills. [Washington, D.C.]: .

Chicago

United States, . 1973. Regulation of surface mining: hearings before Subcommittee on Environment and Subcommittee on Mines and Mining, 93d Congress, 1st session, H.R. 3 and related bills. [Washington, D.C.]: .

Harvard

United States, . (1973). Regulation of surface mining: hearings before Subcommittee on Environment and Subcommittee on Mines and Mining, 93d Congress, 1st session, H.R. 3 and related bills. [Washington, D.C.]: .

MLA

United States, . Regulation of surface mining: hearings before Subcommittee on Environment and Subcommittee on Mines and Mining, 93d Congress, 1st session, H.R. 3 and related bills. [Washington, D.C.]: . 1973.