1. Solar energy reconsidered: ERDA sees bright future;Hammond;Science,1975
2. Solar one: the Delaware solar house and results obtained during the first year of operation;Böer,1974
3. Solar energy operated circulation pump;Czarnecki;Solar Energy Prog. in Australia and New Zealand,1974
4. Utilization of sun and sky radiation for heating and cooling of buildings;Yellott;ASHRAE J.,1973