Alaubydi, Mouruj A., Susan Ahmad, and Muayad Sabri. 2012. “Preparation of Antibodies Type IgY Against Salmonella Typhi Lipopolysaccharide in Chicken Eggs”. Journal of Biotechnology Research Center 6 (2):15-22. https://doi.org/10.24126/jobrc.2012.6.2.214.