TY - RPRT TI - Standard Reference Materials Homogeneity characterization of NBS spectrometric standards II AU - Michaelis, R E AU - Vieth, D L AU - Yakowitz, H PY - 1965 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NBS SP 260-10 DO - 10.6028/NBS.SP.260-10 ER -