TY - GEN AU - Cullen, W C AU - Kleinschmidt, L R AU - Snoke, H R C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1957-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.RPT.5422 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1957 TI - Project 4847 standards for built-up roofs ::interim report ER -