Abubakar, A. F., S. C. Das, A. S. Mainasara, O. Ben, A. Bello, and A. A. Umar. 2014. “Pattern of Maternal Serum Alpha-Foetoprotein Immediately Post Partum in Sokoto State, Nigeria”. International Journal of Health and Medical Information (IJHMI) 3 (2&3):23-27. http://icidr.org.ng/index.php/Ijhmi/article/view/663.