1. WHO. Prevalence and duration of breastfeeding—a critical review of available information.World Health Slat 1982; 35:92–116.
2. WHO.Methodology for determination of breastfeeding patterns. Based on an informal meeting on the development of a methodology for the surveillance of breastfeeding. MCH/BF/SUR/81.1 WHO, Geneva, 1981.
3. WHO.Contemporary patterns of breastfeeding. A report on WHO collaborative study on breastfeeding. WHO, Geneva, 1981.
4. Gopujkar PV, Chaudhury SM, Ramaswamy MA, Gore MS, Gopalan C.Infant feeding practices with special reference to the use of commercial infant foods. Nutrition Foundation of India. Scientific Report 4,1984.
5. Ghosh S, Gidwani S, Mittal SK, Verma RK. Sociocultural factors affecting breastfeeding and other infant feeding practices in an urban community.Indian Pediatr 1976; 13: 827–832.