1. Central Bureau of Statistics: 1989, ?Statistical Abstract of Israel, 1989?, No. 40, Jerusalem.
2. CSAGI: 1957, ?IGY Instruction Manual Part VI. Radiation Instruments and Measurements?, Annals of the IGY IV, 367?466.
3. Drummond, A. J.: 1956, ?On the Measurement of Sky Radiation?, Arch. Met. Geoph. Biokl., Series B, 7, 413?436.
4. Ganor, E. and Foner, H. A.: 1989, ?Composition of Some Urban Atmospheric Aerosols in Israel?, in Juria, H., Steinberger, Y., and Spanier, E. (eds.), Environmental Quality and Ecosystem Stability: Vol. IV A, ISEEQS Publishers Jerusalem, pp. 121?131.
5. Garrison, J. D. and Adler, G. P.: 1990, ?Estimation of Precipitable Water over the United States for Application to the Division of Solar Radiation into its Direct and Diffuse Components?, Solar Energy 44, 225?241.