1. Bell, H. B. (1973). Family resources used in school-related activities. Doctoral dissertation, Michigan State University.
2. Bell, T. H. (1973). Your child’s intellect. - A guide to home-based preschool education. Olympus Publishing Company.
3. Bobbitt, N. (1974). Final report and proceedings of national conference on career education for middle and junior high school, ( 47–60 ). Boston, Olympus Research Corporation.
4. Bobbitt, N., & Paolucci, B. (1975). Home as a Learning Center. Final report for U.S. Office of Education (Contract No. 300748735 ). East Lansing, Michigan: Michigan State University, College of Human Ecology.
5. Braga, 1, & Braga, L. (1975). Learning and growing: A guide to child development. Englewood Cliffs, New Jersey: Prentice-Hall.