1. M. Marvel, Noise and stress, Proceedings of the Surgeon General's Conference on Agricultural Safety and Health, 1991, pp. 293-298.
2. Some medical implications of the 1954 Wisconsin state fair hearing survey;Glorig;Transactions of the American Academy of Ophthalmology and Otolaryngology,1957
3. The effect of tractor noise on the auditory sensitivity of tractor operators;Lierle;Annals of Otology Rhinology and Laryngology,1958
4. Hearing sensitivity in rural Michigan;Townsend;American Industrial Hygiene Association Journal,1975
5. High-frequency hearing loss in male farmers of Missouri;Thelin;Public Health Reports,1983