1. A survey of the quality of some of the principal abundance data of geochemistry;Ahrens;Phys. Chem. Earth,1957
2. Trace element content of the standard granite (G-1) and standard diabase (W-1);Ahrens;U.S. Geol. Survey Bull.,1960
3. Spectrochemical Analysis;Ahrens,1961
4. Zirconium and hafnium in stone meteorites;Ehmann;Science,1963
5. A cooperative investigation of precision and accuracy in chemical, spectrochemical and modal analyses of silicate rocks;Fairbairn;U.S. Geol. Survey Bull.,1951