TY - RPRT TI - Analysis of gold and platinum group alloys by x-ray emission: progress report AU - Eick, J D AU - Smith, D L AU - Rasberry, S D PY - 1964 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS RPT 8639 DO - 10.6028/NBS.RPT.8639 ER -