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2. The extraction of elements with cyclic solvents and its application to geochemical analysis;Boswell;Anal. Chim. Acta,1965
3. Solvent extraction of heptavalent technetium;Boyd;J. Phys. Chem.,1960
4. The Chemistry of Rhenium and Technetium;Colton,1965
5. Anion exchange characteristics of the elements in nitric acid and nitrate solutions and applications in trace element analysis;Faris;Argonne National Laboratory ANL-6811,1964