References
- SmithS. W. and ReaM. S. 1978. Proofreading under different levels of illumination. J of IES 8: 1.
- SmithS. W. and ReaM.S. 1982. Reading test performance under different levels of illumination. J of IES 12: 1.
- BlackwellH. R. 1970. Development of procedures and instruments for visual task evaluation. Illuminating Engineering 65: 4.
- KaufmanJ. E. and ChristensenJ. F., eds. 1972. IES Lighting Handbook, 5th ed. pp. 3–14 to 3–16, New York: Illuminating Engineering Society.