Nwauche, CA, AU Eneh, CO Pughikumo, and IN Chijioke-Nwauche. 2013. “ABO and Rhesus Blood Groups in Mothers and Their Newborns in Port Harcourt, Nigeria”. Port Harcourt Medical Journal 6 (4):455-59. https://doi.org/10.4314/phmedj.v6i4.