Vital and health statistics: Series 11, data from National Health Survey. 11. Hearing levels of adults by age and sex, United States, 1960-62, distribution of hearing levels of adult by age and sex at frequencies of 50, 1000, 2000, 3000, 4000, and 6000 cycles per second for right ear, left ear, and better ear [with list of references; by Aram Glorig and Jean Roberts].

Tools