ClarkJ. H., M.D., “Lighting in relation to public health,” Public Health Service Report. 1924.
6.
Building Standards for Libraries, New York City Department of Public Works.
7.
IES Code for Interior Lighting(Britain), January, 1973.
8.
“Footcandle recommendations,” IE, June, 1959.
9.
Building Research Institute, “The effect of new lighting levels,” Publication 744, National Academy of Sciences—National Research Council, May 20, 1959.
10.
BoyntonR. M., M.D., and BossD. E., M.D., “The effect of background luminance and contrast upon visual search performance,” IERI, 1970.
11.
American Journal of Optometry and Archives of the American Academy of Optometry, vol. 36, no. 5, May, 1959.