Budyko, M.I.1958: The heat balance of the Earth's surface (translation of 1956 Russian edition). Washington, DC: US Department of Commerce, Weather Bureau, 259 pp.
2.
Geiger, R.1965: The climate near the ground (translation of 1961 German edition). Cambridge, MA: Harvard University Press, 611 pp.
3.
Köppen, W. and Geiger, R. , editors 1930-38: Handbuch der Klimatologie (Handbook of climatology), 6 volumes (German and English). Berlin.
4.
Landsberg, H.1947: Physical climatology. School of Mineral Industries , Pennsylvania State University, 283 pp.
