1. Scattered X-rays as internal standards in X-ray emission spectroscopy;Andermann;Anal. Chem.,1958
2. U.S. Geological Survey Standards II;Flanagan,1969
3. 1972 values for international geochemical reference samples;Flanagan;Geochim. Cosmochim. Acta,1973
4. Chemical and spectrochemical analysis of standard silicate samples;Ingamells;Geochim. Cosmochim. Acta,1963
5. Standard materials;National Bureau of Standards;N.B.S. Circ.,1959