J.S B, Akinnubi TR, T.F A, O.B O. An investigation of rainfall variability in the upper and lower river Niger basin development authority areas, Nigeria. IJBAS [Internet]. 2013 Nov. 12 [cited 2024 Dec. 4];2(4):393-8. Available from: https://sciencepubco.com/index.php/ijbas/article/view/1255