TY  - RPRT
TI  - An evaluation of exit symbol visibility 
AU  - Collins, Belinda L
AU  - Lerner, Neil D
PY  - 1983
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 83-2675
DO  - 10.6028/NBS.IR.83-2675
ER  -