“Study of the Relationship Between Blood Group and Group A Beta -Hemolytic Streptococci Isolated from Patients With Tonsillitis”. Iraqi Journal of Science 57, no. 2A (June 24, 2022): 855–861. Accessed May 17, 2024. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/7448.