1. Al-azawi , S. K. 1982 Microbiological aspects of the disposal of sewage waste to agricultural land MSc Thesis
2. Survival of Listeria monocytogenes in soil and water;Botzler;Journal of Wildlife Diseases,1974
3. The occurrence of Listeria monocytogenes in surface water of canals and lakes, in ditches of one polder and in the effluents of canals of a sewage treatment plant;Dijkstra;Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene Abt. I. Orig. B,1982