- Brennan, Matthew J. (ed.), People and Their Environment, J. C. Ferguson Company, Chicago, 1968.
- Final Report, International Working Meeting on Environmental Education in the School Curriculum. International Union for Conservation of Nature and Natural Resources, September 1970, pp. 2123.
- Sanders, Norris M.; Tanck, Marlin L., “A Critical Appraisal of Twenty-Six National Social Studies Projects,” Social Education, 34(no. 4): 383–449, April 1970.
- Taylor, William M., Application of the Strands to Writing Environmental Education Objectives, Draft 1, National Park Service, Western Region, December 21, 1970.
- West, Edith, Director, “Preparation and Evaluation of Social Studies Curriculum Guides and Materials for Grades K to 14,” Project No. HS-045.
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