Photovoltaics; Proceedings of SPIE - The International Society for Optical Engineering, April 11-12, 1985, Arlington, Virginia: Proceedings of SPIE - The International Society for Optical Engineering, Volume 543
title = "Photovoltaics; Proceedings of SPIE - The International Society for Optical Engineering, April 11-12, 1985, Arlington, Virginia: Proceedings of SPIE - The International Society for Optical Engineering, Volume 543",