1. Audiometry—the ultimate test of success?;Atherley;Ann. Occup. Hyg.,1981
2. Hearing protection devices;Berger,1986
3. Guide for conservation of hearing in noise;Cantrell,1982
4. Council directive of 12 May 1986 on the protection of workers from the risks related to noise exposure at work;CEC (Council of the European Communities);Off. J. Europ. Commun.,1986
5. Noise labeling requirements for hearing protectors;USEPA (Environmental Protection Agency);Fed. Reg.,1979