BHATTI, R, and D M SHEIKH. “Variations of ABO Blood Groups. Gene Frequencies in the Population of Sindh (Pakistan)”. Annals of King Edward Medical University 4, no. 4 (October 15, 2020): 55–58. Accessed December 4, 2024. https://annalskemu.org/journal/index.php/annals/article/view/3997.