1. Early experience: A life span perspective;Goldhaber;Paper presented at the Fifth Biennial Conference on Human Development, Atlanta,1978
2. Seitz, V., Apfel, N.H., & Efron, C. Long-term effects of intervention: A longitudinal investigation, Unpublished manuscript, n.d.
3. A social-psychological study of the relationship between parents and child care programs;Powell;Paper presented at the American Educational Research Association meeting, New York,1977
4. The coordination of preschool socialization: Parent-caregiver relationship in day care settings;Powell;Paper presented at the Society for Research in Child Development meeting, New Orleans,1977
5. Centuries of childhood;Aries,1962