TY - RPRT TI - Evaluation of refractory qualities of concretes for jet aircraft warm-up, power check, maintenance aprons, and runways AU - Pendergast, W L AU - Tuma, Edward C AU - Clevenger, R A PY - 1956 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS RPT 4626 DO - 10.6028/NBS.RPT.4626 ER -