Cover image for Hearing levels of adults by education, income, and occupation, United States, 1960-1962; prevalence rates for hearing threshold in the better ear in excess of 15 decibels above and 5 decibels or more below audiometric zero, as determined by pure-tone audiometric tests at frequencies of 500, 1000, 2000, 3000, 4000, and 6000 cycles per second
Title:
Hearing levels of adults by education, income, and occupation, United States, 1960-1962; prevalence rates for hearing threshold in the better ear in excess of 15 decibels above and 5 decibels or more below audiometric zero, as determined by pure-tone audiometric tests at frequencies of 500, 1000, 2000, 3000, 4000, and 6000 cycles per second
Author:
Roberts, Jean, 1918-
Personal Author:
Publication Information:
Washington : U.S. Dept. of Health, Education, and Welfare, Public Health Services; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.], 1968.
Physical Description:
iv, 41 pages : illustrations ; 26 cm.
Language:
English
Subject Term:
Added Author:
Format :
Book