TY - RPRT TI - The effect of insulation on the durability of a smooth-surfaced, built-up roof AU - Cullen, William C AU - Appleton, William H PY - 1962 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS RPT 7470 DO - 10.6028/NBS.RPT.7470 ER -