Shaikh, S., Jamal, S., Mairaj, F., & Asim, A. (2019). Frequency of ABO Blood Group Discrepancies and its Classification into Groups in Tertiary Care Hospital Karachi. Pakistan Journal of Medicine and Dentistry, 7(4), 4. Retrieved from http://ojs.zu.edu.pk/ojs/index.php/pjmd/article/view/143