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Hearing levels of youths 12-17 years, United States : distribution of monaural hearing levels of youths 12-17 years at frequencies of 250, 500, 1000, 2000, 3000, 4000, 6000, and 8000 hertz as determined in individual air-conduction tests, by age, sex, race, geographic region, size of place of residence, family income, and education of parent / Jean Roberts and Elizabeth M. Ahuja.

Jean Roberts 1918-; Elizabeth M. Ahuja; National Center for Health Statistics (U.S.), issuing body.

Rockville, Md. : U.S. Department of Health, Education, and Welfare, Pulic Health Service, Health Resources Administration, National Center for Health Statistics 1975

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