Refraction status and motility defects of persons 4-74 years, United States, 1971-1972 /
Roberts, Jean,1918-
Rowland, Michael,1945-
Hyattsville, Md. : U.S. Dept. of Health, Education, and Welfare, Public Health Service, National Center for Health Statistics,
1978.
Includes bibliographical references.
Eye
Eye
Health surveys