1. Rubidium as a guide to ore in Chilean porphyry copper deposits;Armbrust;Econ. Geol.,1977
2. Thallium;De Albuquerque,1972
3. The relation between Tl, Rb, and K in mineralized and non-mineralized rocks;Ikramuddin;Geol. Soc. Am., Abstr. Prog.,1982
4. The use of Ba/Tl ratios as a guide to mineralization;Ikramuddin;Geol. Soc. Am., Abstr. Prog.,1983
5. A rapid and precise method for the determination of thallium in geological materials at the one nanogram per gram level;Ikramuddin;At. Spectrosc.,1983