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Behavior patterns in school of youths 12-17 years, United States

Oliver, Lincoln I.
Rockville, Md. : U.S. Dept. of Health, Education, and Welfare, Public Health Service, Health Resources Administration, National Center for Health Statistics, 1974. 1974

Disability days, United States, July 1961-June 1962.

National Center for Health Statistics (U.S.)
Washington : 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. Govt. Print. Off.], 1963. 1963

Disability days, United States, July 1963-June 1964

Wilder, Charles S.
Washington : 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. Govt. Print. Off.], 1965. 1965

Disability days, United States, July 1965-June 1966

Ahmed, Paul I.
Washington : U.S. Dept. of Health, Education, and Welfare, Public Health Service : [For sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1968. 1968