1. Table of Radioactive Isotopes;Browne,1986
2. Radiochemical investigations, Appendix IV - Separation of lead from thorium;Gorsuch;Analyst,1959
3. Ion Exchange and Solvent Extraction of Metal Complexes;Marcus,1969
4. Preparation of carrier-free lead-212 (thorium B);Morimoto;Journal of Chemical Education,1959
5. A generator for preparation of carrier-free 224Ra;Sebesta;Journal of Radioanalytical Chemistry,1974