1. and Others, Reorganization of Science in Secondary Schools (United States Bureau of Education, Washington, D. C.: Government Printing Office, Bulletin No. 26, 1920).
2. “The Commission on the reorganization of Secondary Education,” (United States Bureau of Education, Cardinal Principles of Education, Washington, D. C.: Government Printing Office, Bulletin No. 35, 1918).
3. ON THE PLACE OF SCIENCE IN EDUCATION
4. and Others, “Program for Teaching Science,” Thirty-First Yearbook of the National Society for the Study of Education, Part I (Bloomington, Illinois: Public School Publishing Company, 1932).
5. “Program for Teaching Science,” Thirty-First Yearbook of the National Society for the Study of Education, Part I (Bloomington, Illinois: Public School Publishing Company, p. 42.)