TY - GEN AU - Hubert R Snoke AU - Leo J Waldron C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1941-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.BMS.75 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1941 TI - Survey of roofing materials in the north central states: ER -