TY - RPRT TI - Standard Reference Materials Preparation and evaluation of SRM's 481 and 482 gold-silver and gold-copper alloys for microanalysis AU - Michaelis, Robert E AU - Myklebust, Robert L AU - Heinrich, Kurt F J PY - 1971 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NBS SP 260-28 DO - 10.6028/NBS.SP.260-28 ER -