TY - GEN AU - Roberts, Willard E AU - Masters, Larry W AU - Clark, Elizabeth J C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1982-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.IR.81-2448 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1982 TI - Effects of air mass and integration methods on results for optical property measurements of solar cover plate and absorber materials: ER -