Howell, A. R. (1974). Study of the exposure to noise of operators of mechanical logging equipment in British Columbia. Canadian Forestry Service, Department of Environment.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHowell, A. R. Study of the Exposure to Noise of Operators of Mechanical Logging Equipment in British Columbia. Ottawa: Canadian Forestry Service, Department of Environment, 1974.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHowell, A. R. Study of the Exposure to Noise of Operators of Mechanical Logging Equipment in British Columbia. Canadian Forestry Service, Department of Environment, 1974.
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