1. The use of ionisation potentials—I. Ionic radii of the elements;Ahrens;Geochim. et Cosmochim. Acta,1952
2. Second report on a cooperative investigation of the composition of two silicate rocks—IV. Report on trace constituents in granite G-l and diabase W-l;Ahrens;Bull. U.S. Geol. Surv. 1113,1960
3. The pyroxenes and olivines from some Tertiary acid glasses;Carmichael;J. Pet.,1960
4. The feldspar phenocrysts of some Tertiary acid glasses;Carmichael;Mineral. Mag.,1960
5. A note on the composition of some natural acid glasses;Carmichael;Geol. Mag.,1961