Mabika, J Prevalence of vitamin A deficiency in pre-school children at Tongogora Refugee Camp. [electronic resource] - The Central African journal of medicine Aug 1992 - 352-3 p. digital Publication Type: Letter ISSN: 0008-9176 Subjects--Topical Terms: Child, PreschoolCross-Sectional StudiesHumansPrevalenceRefugeesVitamin A Deficiency--epidemiologyZimbabwe--epidemiology