Waleed, M.S., Subhan, S. and Sadiq, W. 2020. A Cross-Sectional Study of the Frequency of Rhesus Factor in the Population of Islamabad. International Research in Medical and Health Sciences. 3, 4 (Sep. 2020), 15-18. DOI:https://doi.org/10.36437/irmhs.2020.3.4.B.