TY - GEN AU - George Turner AU - Belinda Collins C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1981-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.IR.81-2310 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1981 TI - Pedestrian movement characteristics on building ramps: ER -