1. Proc. 11th IEEE Photovoltaic Specialists Conf., Scottsdale, Arizona (IEEE, New York 1974)
2. Proc. 12th IEEE Photovoltaic Specialists Conf., Baton Rouge (IEEE, New York 1976 )
3. Proc. 13th IEEE Photovoltaic Specialists Conf., Washington, D. C. (IEEE, New York 1978 )
4. Proc. 14th IEEE Photovoltaic Specialists Conf., San Diego, CA (IEEE, New York 1980)
5. Proc. 1st E. C. Photovoltaic Solar Energy Conf., Luxemburg (D. Reidel Publ. Comp., Dordrecht 1978 )