Derivation Mathematical Equations for Future Calculation of Potential Evapotranspiration in Iraq, A Review of Application of Thornthwaite Evapotranspiration. Iraqi Journal of Science [Internet]. 2019 May 26 [cited 2024 Nov. 22];60(5):1037-48. Available from: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/758