Todorov, Velislav, Maria Boycheva, and Milen Boichev. “BLOOD GROUP AFFILIATION OF THE CONTEMPORARY BULGARIAN POPULATION FROM THE AREA OF SHUMEN: BLOOD GROUP AFFILIATION OF THE CONTEMPORARY BULGARIAN POPULATION FROM THE AREA OF SHUMEN”. JOURNAL SCIENTIFIC AND APPLIED RESEARCH 21, no. 1 (March 25, 2023): 5–8. Accessed November 7, 2024. https://jsar.ftn.shu.bg/index.php/jsar/article/view/312.