1. Quantitative Spectrochemical Analysis of Silicates;Ahrens,1954
2. Second report on a cooperative investigation of the composition of two silicate rocks. IV—Report on trace constituents in granite G-I and diabase W-I;Ahrens;Bull. U.S. Geol. Surv.,1960
3. Rapid field and laboratory method for the determination of copper in soils and rocks;Almond;Bull. U.S. Geol. Surv.,1955
4. A cooperative investigation of precision and accuracy in chemical, spectrochemical and modal analysis of silicate rocks;Fairbairn;Bull. U.S. Geol. Surv.,1951
5. Precision and accuracy of chemical analysis of silicate rocks;Fairbairn;Geochim. et Cosmochim. Acta,1953