1. Solar radiation on inclined surfaces;Scerri,1965
2. Solarimeter for field use;Monteith;J. Sci. Inst.,1959
3. Measurement of direct, diffuse and total solar radiation with silicon photovoltaic cells;Yellott;J. Solar Energy,1962
4. Communication from the Building Research Station, Herts, U.K.
5. The solar constant;Johnson;J. Met.,1954