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 PY - 1958 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS RPT 6198 DO - 10.6028/NBS.RPT.6198 ER -