1. 1. The Astronomical Almanac for the Year 1985. London
2. 2. (UK): Her Majesty's Stationary Office: Washington/ DC: U.S. Government Printing Office, 1985
3. Guide to Meteorological Instruments and Methods of Observation. Volume Vol. 5 of WMO No. 8, Fifth Edition, WMO, 1983
4. A Preliminary Cloudless Standard Atmosphere for Radiation Computation. Technical Report WCP-112, WMO/TD-Nr. 24, WMO/WCP, 1986
5. Agnihotri, O. P.; Gupta, B. K.: Solar Selective Surfaces. New York: John Wiley k Sons, 1981