El-Gazzar, F.E. and E.H. Marth. 1992. Foodborne Disease: Investigative Procedures and Economic Assessment. J. Environmental Health. 55 (2): 24-27.
كلية الزراعة
جامعة أسيوط
El-Gazzar, F.E. and E.H. Marth. 1992. Foodborne Disease: Investigative Procedures and Economic Assessment. J. Environmental Health. 55 (2): 24-27.
جامعة أسيوط