TY - GEN AU - Ryan, J V AU - Tuma, E C AU - Bettum, W N C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1964-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.RPT.8342 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1964 TI - Evaluation of refractory qualities of concretes for jet aircraft warm-up, power check maintenance aprons, and runways: ER -