Aziz Khalil, N., نوال, A. Mahmood Alrawi, and أمیرة. “Extraction of Heat-Stable Enterotoxin of Yersinia Enterocolitica”. Journal of Education and Science (JES), vol. 26, no. 1, Mar. 2013, pp. 28-34, doi:10.33899/edusj.2013.89422.