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Evaluation of exit directional symbols:



Neil D Lerner
- NBS IR 81-2268
Report Number
NBS IR 81-2268


Lerner, N. (1981), Evaluation of exit directional symbols:, , National Institute of Standards and Technology, Gaithersburg, MD, [online], (Accessed April 24, 2024)
Created January 1, 1981, Updated May 19, 2023