Almack, John C., and James F. Bursch .The Administration of Consolidated and Village Schools. Boston: The Houghton Mifflin Company. 1925, pp. 87-88.
2.
Brown, Edwin J., and Louis H. Fritzmeyer , "Some Factors in Measuring the Teacher's Load ," Educational Administration and Supervision, (January 1931), 17:68-69.
3.
Clark, Leonard H., "Wearing Effect of Various Teaching Activities," School Executive, (February 1954), 73:47-49.
4.
Douglass, Harl R., Organization and Administration ofSecondary Schools, (Revised Edition). New York: Ginn and Company. 1945, p. 112-119.
5.
....., "1950 Revision of the Douglass High School Teaching Formula," The Bulletin of the National Association of Secondary-School Principals, (May 1951), 35:18-24.
6.
Frost, Norman, "What Teaching Load," American School Board Journal , (March 1941), 102:43-45.
7.
Jung, Christian Wood, The Development of a Proposed Revision of the Douglass Formula for Measuring Teacher Load in the Secondary School. Unpublished Doctoral Dissertation, University of Colorado, 1949.
8.
Odell, C.W., "Teacher Load in Illinois High Schools," The Bulletin of the National Association of Secondary-School Principals, (January, 1949), 33:91-94.
9.
Pettit, M.S., "Determining Teacher Load," American School Board Journal , (March 1954), 128, 34ff.
10.
Report of the Standards Committee, Redford High School , Detroit, Michigan, 1946.
11.
Sand, Harold Julian, An Analysis of Certain Factors Pertaining to Teaching Load in the Public School. Unpublished Master's Thesis, University of Minnesota, 1934.
12.
Stover, James D., Letter to Secondary-School Principals, Cincinnati Public Schools, Cincinnati, Ohio, April 4, 1944.
13.
Ward, William A., "Figuring the Teacher's Load," Nation's Schools, (March 1936), 17:22.
14.
Woody, Clifford, and W.G. Bergman, "The Measurement and Equalization of Teaching Load in the High School ," North Central Association Quarterly, (December 1926), 1:339-358.