1. Climatic Types of the Earth (after Koppen), Climatology;Haurwitz,1944
2. Average monthly cloud cover for the global tropics as determined from satellite observations;Sadler,1966
3. Worldwide cloud cover distribution for use in computer simulations;Sherr,1968
4. Distribution of the principal Clmates of the earth;Thornwaite,1941
5. Climates of the Earth, An Introduction to Weather and Climate;Trewartha,1943