1. Crommelynck, D., Latimer, J. R.: Spectral Irradiance Measurements of Natural Sources. In: An Introduction to Meteorological Measurements and Data Handling for Solar Energy. Applications. DOE/ER-0084, U.S. Department of Energy, Washington, October 1980.
2. WMO, CIMO-VIII/Doc.31. Radiation Measurements. Report of the Working Group on Radiation Measurement. Mexico City, October 1981.
3. Drummond, A. J., Roche, J. J.: The Measurement of Spectral Distribution of Sun and Sky Radiation by Use of Colored Glass Filters. Arch. Met. Geoph. Biokl., Ser. B14, 326–335 (1966).
4. Drummond, A. J., Roche, J. J.: Corrections to be Applied to Measurements Made with Eppley (and Other) Spectral Radiometers when Used with Schott Colored Glasses. J. Appl. Met.7, 741–744 (1965).
5. List, R.: Smithsonian Meteorological Tables. Washington, 1958.