1. Allen R. G. (1995). “Evaluation of procedures for estimating mean monthly solar radiation from air temperature.” Report submitted to the United Nations Food and Agriculture Organization (FAO) Rome Italy.
2. Rational Use of The FAO Blaney‐Criddle Formula
3. Allen R. G. and Gichuki F. N. (1989). “Effects of projected CO 2 -induced climatic changes on irrigation water requirements in the Great Plain states.” The potential effects of global climate change on the United States: Appendix C—agriculture J. B. Smith and D. A. Tirpak eds. EPA-230-05-89-053.
4. Weather Station Siting and Consumptive Use Estimates
5. Operational Estimates of Reference Evapotranspiration