1. The estimation of monthly mean values of daily total shortwave radiation on vertical and inclined surfaces from sunshine records for latitudes 40°N–40°S;Page,1961
2. Solar Energy Thermal Processes;Duffie,1974
3. Calculation of monthly mean solar radiation for horizontal and inclined surfaces;Hay;Solar Energy,1979
4. Solar radiation in Lebanon;Sfeir;Solar Energy,1981
5. Radiation: Short Period Averages 1957–1975,1980