Dibal, J.M., Bashir, A.U., Haruna, M.M. and Abubakar, N.A. 2021. Sensitivities of some Reference Evapotranspiration Models to the Key Climatic Variables in Northeastern Nigeria. ARID ZONE JOURNAL OF ENGINEERING, TECHNOLOGY AND ENVIRONMENT. 17, 1 (Mar. 2021), 91-102.