Hathout, Saad Ed-Din, El-Ghaffar, Yasin Abd, Awny, Ahmed Yousef and Hassan, Khalid: Amer. J. Trop. Med.15: 156, 1966.
5.
Merselis, J.G. , Jr., Kaye, D., Conway , S.C. and Hook, E.W.: E. Afr. Med. J.41: 219, 1964.
6.
Russell, E.M. , Sutherland, A. and Walker, W.: Brit. Med. J.2: 555, 1966.
7.
Simon, H.J. and Miller, R.C.: New Eng. J. Med.274: 807, 1966.
8.
Troy, P.: Brit. Med. J.2: 756, 1964.
9.
United States Department of Health, Education, and Welfare, Public Health Service, National Office of Vital Statistics, Vital Statistics of the United States Morbidity and Mortality Weekly Report , Washington, D. C., Government Printing Office, 1964-1965.
10.
United States Department of Health, Education, and Welfare, Public Health Service, Salmonelal Surveillance, Annual Summary 1965, Communicable Disease Center, Atlanta, Georgia, 1966.
11.
Vogelsand, Th. M.: J. Hyg. (Camb.) 62: 443, 1964.
12.
Whitby, J.M.F. : Lancet2: 71, 1964.
13.
Woodward, T.E. et al.: Medical Clinics of N.A (In press) 1967.