1. Food acceptance and nutrition intake of preschool children;Harrill;Journal of Nutrition Education,1972
2. Food for thought: Nutrition education for young children;Herr;Young Children,1982
3. Predicting application of nutrition education;Poolton;Journal of Nutrition Education,1972
4. The child's conception of physical causality;Piaget,1930
5. The Early growth of logic in the child: Classification and seriation;Inhelder,1964