APA

United States, . (1972). Review of developments in coal gasification: hearing before Subcommittee on Minerals, Materials, and Fuels, pursuant to S. Res. 45, 92d Congress, 1st session, Nov. 18, 1971. [Washington, D.C.]: .

Chicago

United States, . 1972. Review of developments in coal gasification: hearing before Subcommittee on Minerals, Materials, and Fuels, pursuant to S. Res. 45, 92d Congress, 1st session, Nov. 18, 1971. [Washington, D.C.]: .

Harvard

United States, . (1972). Review of developments in coal gasification: hearing before Subcommittee on Minerals, Materials, and Fuels, pursuant to S. Res. 45, 92d Congress, 1st session, Nov. 18, 1971. [Washington, D.C.]: .

MLA

United States, . Review of developments in coal gasification: hearing before Subcommittee on Minerals, Materials, and Fuels, pursuant to S. Res. 45, 92d Congress, 1st session, Nov. 18, 1971. [Washington, D.C.]: . 1972.