References
- DavidsonC. H., “Even for Mercury Vapor, Maintenance is Vital”, Electrical World, October 28, 1968, p. 32.
- MitchellM. E., “The Importance of Gaskets in Maintaining Luminaire Efficiency”, Outdoor Lighting, March-April 1972, p. 18.
- Van DusenHarold A.Jr., “Street Lighting Luminaire Dirt Depreciation”, Illuminating Engineering, February 1971, p. 122.
- U.S. Department of Health, Education and Welfare, “Air Quality Data”, 1966 Edition, National Air Pollution Control Administration Publication No. APTD 68–9,DurhamN. C., 1968.
- Van DusenHarold A.Jr., and WandlerDonald, “Street Lighting Pole Vibration Research”, Illuminating Engineering, November, 1965, p. 654, 657–658.
- Van DusenHarold A.Jr., “Street Lighting Luminaire Vibration”, Illuminating Engineering, February 1968, p. 67.