Color vision deficiencies in children, United States; prevalence of color vision deficiencies, as identified on examination with plates from the Ishihara test and typed with the Hardy-Rand-Ritter test, among children of 6-11 years by age, sex, race, family income, and area of residence.
Scanlon, James V.
Roberts, Jean,1918-joint author.
Rockville, Md., National Center for Health Statistics; [for sale by the Supt. of Docs., U.S. Govt. Print. Off., Washington]
1972.
Includes bibliographical references.
Color blindness in children