[54] Frank M. McMurry, Report on Educational Aspects of the Public School System of the City of New York, 1911-1912, Part II, p. 265.
[55] Report of the President of Yale University, 1908-1909. Published by the University, New Haven, 1909.
[56] Samuel Chester Parker, Methods of Teaching in High Schools, pp. 318-319. Ginn and Company, 1915.
[57] Lewis M. Terman, The Measurement of Intelligence, pp. 161-163. Houghton Mifflin Company, 1916.
[58] Bertha M. Stevens, Boys and Girls in Commercial Work, pp. 179-180. Cleveland Education Survey. Published by the Survey Committee of the Cleveland Foundation, Cleveland, Ohio, 1916.
[59] Bertha M. Stevens, Boys and Girls in Commercial Work, pp. 14-16. Cleveland Education Survey. Published by the Survey Committee of the Cleveland Foundation, Cleveland, Ohio, 1916.
[60] Measuring the Work of the Public Schools, pp. 131-133. Cleveland Education Survey. Published by the Survey Committee of the Cleveland Foundation, Cleveland, Ohio, 1916.
[61] Proceedings of the National Education Association for 1915, p. 256. Published by the Secretary of the Association, Ann Arbor, Michigan, 1915.
[62] John Fiske, The Meaning of Infancy. Houghton Mifflin Company, 1909.
[63] Bailey B. Burritt, “Professional Distribution of College and University Graduates,” p. 15. Bulletin No. 19, United States Bureau of Education, 1912.