TY - GEN AU - Kenneth L Eckerle AU - J J Hsia C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1984-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.SP.671 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1984 TI - Retroreflectance MAP service for coefficient of luminous intensity: ER -