1. Energy system emissions and material requirements;Alexandria,1989
2. Proc. 9th Commission of the European Communities Conf. on Photovoltaic Solar Energy;Hagedorn,1989
3. Proc. 21st Photovoltaic Specialists' Conf.;De Meo,1990
4. Proc. 2nd Commission of the European Communities Conf. on Photovoltaic Solar Energy;Rappaport,1979
5. 27.5-percent silicon concentrator solar cells