Research and Analysis by Ralph G. Hurlin

Estimated Prevalence of Blindness in the United States, July 1952
from Social Security Bulletin, Vol. 16, No. 7 (released July 1953)
by Ralph G. Hurlin

Regional Differences in the Prevalence of Blindness
from Social Security Bulletin, Vol. 13, No. 9 (released September 1950)
by Ralph G. Hurlin and Walter M. Perkins