Hassan, S. F., A. M. El-Tantawi, and U. S. Hashidu,
"Trends of Rainfall and Temperature over North-Eastern Nigeria (1949-2014)",
IOSR Journal of Environmental Science, Toxicology and Food Technology (IOSR-JESTFT), vol. Volume 11, issue Issue 5 Ver. I , pp. 01-09, 2017.