NavGeneral InfoEmail Print Geography Sudan [Historical] (SDN) (South Sudan, Sudan) Time period covered 01/1950 - 12/1990 Data type Scientific literature Citation Authors El Bushra HE Journal East Afr Med J Volume 69 Issue 5 Pages 279-81 Publication year 1992 Suggested citation El Bushra HE. Vitamin A deficiency in the Sudan: A call for a surveillance system. East Afr Med J. 1992; 69(5): 279-81. GHDx Entry last modified on: Mar 3, 2019