A. Alwan, Imzahim, Abdul Razzak T. Ziboon, and Alaa G. Khalaf. “Comparison of Nine Meteorological Drought Indices Over Middle Euphrates Region During Period from 1988 To 2017”. International Journal of Engineering & Technology 7, no. 4.20 (November 28, 2018): 602–607. Accessed May 3, 2024. https://www.sciencepubco.com/index.php/ijet/article/view/27400.