TY - RPRT TI - Evaluation of refractory qualities of concretes for jet aircraft warm-up, power check maintenance aprons, and runways : quarterly report AU - Ryan, James V AU - Tuma, E C AU - Ward, D K PY - 1963 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS report ; 7780 DO - 10.6028/NBS.RPT.7780 ER -