1. Buckman, C., and Tolman, C.: Screening for Glaucoma. U. S. Department of Health, Education and Welfare, Public Health Service Publication No. 666, Jan.-Aug., 1955.
2. Study of the frequency and distribution of glaucoma;Packer;JAMA,1959
3. Holmes, E., Jr.: Screening for Glaucoma. U. S. Department of Health, Education and Welfare, Public Health Service Publication No. 666, Dec., 1949, to Aug., 1950.
4. Cleveland glaucoma study;Wolpaw;Sight-sav. Rev.,1954
5. Sowder, W.: Florida State Board of Health Prevention of Blindness Program, Aug., 1963.