References
- Bailey, Henry T. & Sargent, Walter L. Outline of lessons in drawing for rural schools in Massachusetts, 1896.
- Clark, Arthur B. The child's attitude toward perspective problems, Studies in Education, 1896-97, 1, 283–294.
- Ibid., 283.
- Department of Commerce and Labor, Statistical abstract of the United States. Washington, D.C.: Government Printing Office, 1896.
- Department of Commerce and Labor, Statistical abstract of the United States. Washington, D. C: Government Printing Office, 1910.
- Eisner, Elliot. Educating artistic vision. New York: Macmillian, 1972.
- Harris, Dale B. Children's drawings as measures of intellectual maturity. New York: Harcourt, Brace & World, 1963.
- Kellogg, Rhoda. Analyzing children's art. Palo Alto: National Press Books, 1970.
- Oakland Public Schools Drawing Department, Methods of teaching drawing in the first, second, and third grades. Oakland, California: Enquirer Publishing Company, 1899.
- Schaefer-Simmern, Henry. The unfolding of artistic activity. Berkeley: University of California Press, 1948.