1. The Relations of Hearing Loss to Noise Exposure;American Standards Association,1954
2. The Calibration of Audiometers used in Industry;Atherley, G.R.C.,1964
3. The Normal Threshold of Hearing for Pure Tones by Earphone Listening;Dingwall-Fordyce, I.;Brit. J. industr. Med,1963
4. Burns, W., and Littler, T. S. (1960). In Modern Trends in Occupational Health, Ed. R. S. F. Schilling, Ch. 17. Butterworth, London.
5. Damage-Risk Criteria and Noise-Induced Hearing Loss in The Control of Noise;Glorig, A.; Ward, W.D.; Nixon, J.;[National Physical Laboratory Symposium No,1962