X-ray fluorescence
29. 1969 B.E. Leake, G.L. Hendry, A. Kemp, A.G. Plant, P.K. Harvey, J.R. Wilson, J.S. Coats, J.W. Aucott, T. Liinel &amp; J.R. Howarth. The chemical analysis of rock powders by automatic X-ray fluorescence. Chemical Geology 5, 7 -86.