TY - RPRT TI - Standard Reference Materials : Homogeneity characterization of NBS spectrometric standards III / AU - Vieth, D L AU - Yakowitz, H PY - 1966 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NBS SP 260-12 DO - 10.6028/NBS.SP.260-12 ER -