1. Report on trace constituents in granite G-1 and diabase W-1;Ahrens;Bull. U.S. geol. Surv.,1960
2. Spectrochemical Analysis;Ahrens,1961
3. Gallium in Younger Granites of Northern Nigeria;Bowden;Geochim. Cosmochim. Acta,1964
4. The distribution of the five alkali elements and fluorine in some granites and associated aureoles from the southwest of England;Bowler,1959
5. Thallium in some igneous rocks;Butler;Geochemistry,1962