TY - RPRT TI - Certification of the standard reference material 1473a: a low density polyethylene resin AU - Maurey, J R AU - Blair, W R AU - Guttman, C M PY - 1995 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST IR 5639 DO - 10.6028/NIST.IR.5639 ER -