TY - RPRT TI - High-efficiency concentration/multi-solar-cell system for orbital power generation AU - Onffroy, J. R. AU - Stoltzmann, D. E. AU - Lin, R. J. H. AU - Knowles, G. R. PY - 1980 UR - https://ntrs.nasa.gov/citations/19800064037 ID - 19800064037 ER -