TY - RPRT TI - Evaluation of refractory qualities of concretes for jet aircraft warm up, power check, and maintenance aprons, quarterly report on AU - Pendergast, W L AU - Heindl, R A AU - Enoch, CR AU - Clevenger, R A PY - 1952 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS RPT 2003 DO - 10.6028/NBS.RPT.2003 ER -