Collins, B. L.
view article (10.004545)
Visibility of Exit Signs and Directional Indicators.
National Institute of Standards and Technology, Gaithersburg, MD
Journal of the Illuminating Engineering Society,
Vol. 20,
No. 1,
117-133,
Winter 1991
National Electrical Manufacturers Assoc., Washington, DC,
Collins, B. L.; Goodin, P. J.
view article (9.992496)
Visibility of Exit Directional Indicators.
National Institute of Standards and Technology, Gaithersburg
National Electrical Manufacturers Assoc., Washington, DC,
NISTIR 4532,
March 1991,
43 p.