1. Optimal Positions of a Flat Solar-Energy Collector for Selected Conditions and Geometries;Borgefors,1975
2. On the optimum tilt of a solar collector;Kern;Solar Energy,1975
3. A Simplified Method for Sizing a Solar Collector Array for Space Heating;Balcomb,1976
4. Relative Effective Solar Space Heating Over the United States Obtained from Southward-Tilted Solar Collectors;Hoecker,1978
5. Availability of Direct, Total, and Diffuse Solar Radiation to Fixed and Tracking Collectors in the USA;Boes,1977