References
- Klingele, W. E. 1979. Teaching in middle school. Boston: Allyn and Bacon.
- Lounsbury, J.H. & Vars, G. F. 1978. A curriculum for middle school years. New York: Harper and Row.
- Moss, T. C. 1969. Middle School. Boston: Houghton Mifflin.
- Overton, H. 1966. The rise and fall of the core curriculum. Clearing House, 40, (9), 532–537.
- Van Til, W., Vars, G. F. & Lounsbury, J. H. 1967. Modern education for junior high school years. (2nd Ed.). Indianapolis: Bobbs-Merrill.
- Vars, G. F. 1969. A contemporary view of the core curriculum. In G.G. Vars (Ed.). Common learning: Core and interdisciplinary team approaches. Scranton: International Textbook Company.
- Wright, G. S. 1950. Core curriculum in public schools: An inquiry into practices, 1949. U. S. Office of education bulletin, Bulletin 1950. (5). Government printing office. Washington, D. C.
- Wright, G. S. 1958. Block-time classes and the core program in the junior high school. U. S. Office of education bulletin, Bulletin 1958. (6). Government printing office. Washington D. C.
- Wroblewski, J. J. 1967. Trends in the junior high school curriculum in the United States, 1930–1967. Unpublished Ph.D dissertation, University of Iowa.