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Family background, early development, and intelligence of children 6-11 years: United States

Roberts, Jean, 1918- author.
Hyattsville, Md. : U.S. Department of Health, Education, and Welfare, Public Health Service, Health Resources Administration, National Center for Health Statistics, 1977. 1977

Rheumatoid arthritis in adults, United States - 1960-1962

Engel, Arnold, author.
Rockville, Maryland : U.S. Department of Health, Education, and Welfare, Public Health Service, Health Resources Administration, National Center for Health Statistics, [1975] 1975

Selected examination findings related to periodontal disease among adults, United States - 1960-1962

Kelly, James E., 1923- author.
Rockville, Md. : U.S. Department of Health, Education, and Welfare, Public Health Service, Health Resources Administration, 1974. 1974