1. First Call for Children: World Declaration and Plan of Action from the World Summit for Children;UNICEF,1990
2. The EPI Coverage Survey;World Health Organization;WHO Expanded Program of Immunization,1988
3. Monitoring child survival programs in Africa: the Africa child survival initiative;Foster,1991
4. Impact of health programs on child mortality in Africa: evidence from Zaire and Liberia;Ewbank,1991
5. Immunization: Levels, Trends, and Differentials;Boerma,1990