1. Geochemical Exploration of the Moon and Planets;Adler,1970
2. Apollo 15 geochemical X-ray fluorescence experiment: Preliminary report;Adler;Science,1972
3. Xspec: The first ten years;Arnaud,1996
4. Particle size effects in radioisotope X-ray spectrometry;Berry;Adv. X-Ray Anal.,1969
5. Heterogeneity effects in X-ray analysis;Claisse;Adv. X-Ray Anal.,1962