TY - RPRT TI - Suggested research topics for the Construction Engineering Research Laboratory (CERL) program, evaluation of roofing materials degradation processes AU - Rossiter, Walter J AU - Masters, Larry W PY - 1988 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NIST IR 88-3870 DO - 10.6028/NIST.IR.88-3870 ER -