Renewable energy technologies--research directions, investment opportunities, and challenges to commercial application in the United States and the developing world : field hearing before the Subcommittee on Energy, Committee on Science, House of Representatives, One Hundred Ninth Congress, second session, August 2, 2006.
Imprint
Washington : U.S. G.P.O. : For sale by the Supt. of Docs., U.S. G.P.O., 2006.