Ugwu, Ngozi Immaculata. “Pattern of ABO and Rhesus Blood Group Distribution Among Students of Ebonyi State University, Abakaliki, South Eastern Nigeria”. Asian Journal of Medical Sciences 7, no. 1 (August 28, 2015): 101–104. Accessed December 6, 2025. https://www.nepjol.info/index.php/AJMS/article/view/12716.