TY - RPRT TI - Evaluation of refractory qualities of concretes for jet aircraft warm-up, power check, maintenance aprons, and runways : quarterly report AU - Pendergast, W L AU - Tuma, E C AU - Mong, L E AU - Trattner, E PY - 1957 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS RPT 5353 DO - 10.6028/NBS.RPT.5353 ER -