TY - GEN AU - John Archea AU - Belinda L Collins AU - Fred I Stahl C2 - Building Science Series, National Institute of Standards and Technology, Gaithersburg, MD DA - 1979-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.BSS.120 LA - en PB - Building Science Series, National Institute of Standards and Technology, Gaithersburg, MD PY - 1979 TI - Guidelines for stair safety: ER -