TY - RPRT TI - Reference standard polyethylene resins and piping materials : final report (October 1, 1985 - September 30, 1986) AU - Crissman, J M AU - Wang, F W AU - Guttman, C M AU - Maurey, J R AU - Wagner, H L AU - Fanconi, B M AU - VanderHart, D L PY - 1987 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS IR 87-3506 DO - 10.6028/NBS.IR.87-3506 ER -