TY - GEN AU - Collins, Belinda C2 - Building Science Series, National Institute of Standards and Technology, Gaithersburg, MD DA - 1982-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.BSS.141 LA - en PB - Building Science Series, National Institute of Standards and Technology, Gaithersburg, MD PY - 1982 TI - The development and evaluation of effective symbol signs: ER -