1. The use of ionisation potentials. Part 2. Anion affinity and geochemistry;Ahrens;Geochim. et Cosmochim. Acta,1953
2. Quantitative Spectrochemical Analysis of Silicates;Ahrens,1954
3. Second report on a co-operative investigation into the composition of two silicate rocks;Ahrens;U.S. Geol. Survey Bull. No. 1113,1960
4. Berg G. (1925) quoted in Goldschmidt (1954).
5. The geochemistry and mineralogy of rock weathering (1) The Lizard area, Cornwall;Butler;Geochim. et Cosmochim. Acta,1953