Harmsen, Eric W., and Antonio L. González-Pérez. “COMPUTER PROGRAM FOR ESTIMATING CROP EVAPOTRANSPIRATION IN PUERTO RICO”. The Journal of Agriculture of the University of Puerto Rico 89, no. 1-2 (April 1, 2005): 107–113. Accessed February 4, 2023. https://revistas.upr.edu/index.php/jaupr/article/view/1074.