Conference on Energy-Conserving, Solar-Heated Greenhouses 1979 Solar greenhouses: living and growing : proceedings of the Second Conference on Energy-Conserving, Solar-Heated Greenhouses, held at Plymouth, Massachusetts on April 6,7 & 8, 1979 1977 Proceedings of the Conference on Energy-Conserving, Solar-Heated Greenhouses : held at Marlboro College, Marlboro, Vermont on November 19 & 20, 1977