DescriptionDenishayes1980.jpg English: DenisHayes, while director of the Solar Energy Research Institute (1979-1981). Date circa 1980 date QS:P,+1980-00-00T00:00:00Z/9
DescriptionDenisHayes (cropped).jpg English: DenisHayes, while director of the Solar Energy Research Institute (1979-1981). Date circa 1980 date QS:P,+1980-00-00T00:00:00Z/9