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.

SeriesVital and health statistics Series 11 ; no. 118
Vital and health statistics. Series 11 ; no. 118. UNAUTHORIZED
LCCN 77190010

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