Allen, D., Berman, P., Brownson, R., Olson, D., Analysis of the results of the Washington County District 15 elementary school vision screening program, the abbo study. Unpublished doctoral dissertation, Pacific University, 1975.
2.
Apell, R., Child Behavior. New Haven, Conn.: Gesell Institute of Visual Development, 1957.
3.
Downie, N., Heath, R., Basic Statistical Methods. New York: Harper and Brothers, 1959.
4.
Eden, K., Improving visual skills: A guide for teachers of the handicapped. Iowa University, Iowa City, Iowa: Special Education Curriculum Development Center, ED 074647 (U.S. Department of HEW), March 1973.
5.
Flax, N., Vision and learning disabilities: Optometry's contribution. In T. Greenstein (Ed.), Vision and Learning Disability . St. Louis, Mo.: American Optometric Association, 1976, pp. 1-20.
6.
Getman, G., How to Develop your Child's Intelligence. Minn. : The Announcer Press, 1962.
7.
Greenstein, T., Identification of children with vision problems that interfere with learning . In T. Greenstein (Ed.), Vision and Learning Disability. St. Louis, Mo.: American Optometric Association, 1976, 95-114.
8.
Heinsen, A., Pursuit, Centering, Alignment Test and Convergence Test. Unpublished, Vision Care Clinic, 2730 Union Ave., San Jose, Calif ., 1977.
9.
Morgan, M., The effect of visual perceptual training upon subsequent scholastic progress of children with specific visual disabilities. Unpublished master's thesis , University of Nevada, 1966.
10.
Radler, D., Kephart, N., Success through Play. New York: Harper and Brothers, 1960.
