1. The Essentials of Factor Analysis;Child,1970
2. Compton-scattered tungsten X-rays as a measure of mass absorption coefficients in rocks;De Long;Am. Mineral.,1973
3. Matrix corrections in the X-ray spectrographic trace element analysis of rocks and minerals;Hower;Am. Mineral.,1959
4. Practical X-ray Spectrometry;Jenkins,1973
5. X-ray Diffraction Procedures;Klug,1974