References
- Committee on Roadway Lighting of the IES, “American national standard practice for roadway lighting”, Journal of the Illuminating Engineering Society, Vol. 1, No. 4, July 1972, p. 334.
- ‘Guide on safety rest areas for the national system of interstate and defense highways, American Association of State Highway Officials, 341 National Press Building, Washington, D.C. 20004, 1968.
- Guide for highway landscape and environmental design, American Association of State Highway Officials, 341 National Press Building, Washington, D.C. 20004, 1970.
- IES Lighting Handbook, 5th Edition, Illuminating Engineering Society, 345 East 47th Street, New York, N. Y. 10017, 1972.