1. Technical Digest of 1st Int. PV Sci. Eng. Conf.;Mitchell,1984
2. DOE/SERI Amorphous Silicon Subcontractors' Review Meeting;Mitchell,1989
3. Proc. 2oth IEEE PV Specialists Conf.;Bottenberg,1988
4. Proc. 4th Int. PV Sci. Conf.;Mitchell,1989
5. Laxmi Mgrid, Solar Energy Research Institute, Golden, CO, private communication, 1989.