1. Thin film gallium arsenide for low cost photovoltaic solar energy conversion;Stevenson,1973
2. Personal communication with Gilbert H. Walker of NASA Langley Research Center, Hampton, VA 23665, U.S.A.
3. Feasibility investigations of growing and characterizing gallium arsenide crystals in ribbon form;Berkowitz,1975
4. Terrestrial photovoltaic power systems with sunlight concentration;Backus,1975
5. A preliminary analysis of combined solar photovoltaic thermal systems for terrestrial applications. Sandia Laboratories;Barton;Report No. SAND 74-0398,1975