Buffo, John; Fritschen, Leo; U.S. International Biological Program. Coniferous Forest Biome; University of Washington (Seattle : University of Washington, 1973)
Direct-beam solar radiation is presented in graphical and tabular form for hourly, daily, and yearly values for 7 slopes on 16 aspects at 45 and 47.5 degrees north latitude. Theoretical equations necessary for the calcu ...