Occupational disease potentials in the heavy equipment operator.
D000293:Adolescent; D000328:Adult; D001299:Audiometry; D002140:California; D006317:Hearing Loss, Noise-Induced; D006801:Humans; D008875:Middle Aged; D009784:Occupational Diseases / Q000209:etiology*; D012829:Silicosis / Q000209:etiology*