Plan, operation, and response results of a program of children's examinations : a description of the Health Examination Survey's second cycle, examinations of a probability sample of United States children 6-11 years of age
Washington, D.C. : U.S. Dept. of Health, Education and Welfare, Public Health Service, National Center for Health Statistics : For sale by the Supt. of Docs., U.S. G.P.O., 1967