This document contains six papers prepared between 1969 and 1975 by the Protein-Calorie Advisory Group (PAG) of the United Nations on topics related to the feeding of preschool children in underdeveloped countries. Among the topics covered: (1) nutrition in utero; (2) nutritional aspects of breastfeeding; (3) infant mortality rates as indicators of nutritional advances; (4) nutritional implications of milk intolerance; (5) standards and regulations for special foods for infants and young children; (6) legislation for protection of working women during pregnancy and lactation; (7) use of home-prepared legumes and green leafy vegetables; (8) nutrition activities of local health services; (9) emergency foods for infants and young children; and (10) the relationship of pre- and postnatal malnutrition in children to mental development, learning, and behavior. (JMB)