|Autor / Institución
||Richard. G. Allen & William. O. Pruitt, Journal of irrigation and drainage engineering
||Improved equations are presented for calculating correction factors for the United Nations Food and Agriculture Organization Irrigation and Drainage Paper Number 24 (FAO?24) grass reference evapotranspiration methods. Correction factors are included to correct reference evapotranspiration estimates for varying climatic conditions of windiness, humidity, and sunshine.