TY - RPRT TI - SRM NIST standard reference materials 2018 catalog AU - Montgomery, Regina R AU - Benkstein, Jennifer E PY - 2018 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST SP 260-176-2018 DO - 10.6028/NIST.SP.260-176-2018 ER -