Status of the U.S. photovoltaic industry and its potential foreign markets : hearing before the Subcommittee on Energy Research and Development of the Committee on Energy and Natural Resources, United States Senate, Ninety-seventh Congress, first session, on the review of the domestic photovoltaic industry and the General Accounting Office survey of members of the U.S. photovoltaic industry regarding the effects of the Department of Energy's budget reorientation toward more emphasis on R. & D. review this industry's ability to compete in foreign markets, September 21, 1981.