TY - GEN AU - Collins, Belinda L AU - Dahir, Mubarak S AU - Madrzykowski, Daniel C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1990-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.IR.4399 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1990 TI - Evaluation of exit signs in clear and smoke conditions: ER -