1. Advances in tantalum and niobium technology;Tolley;Tantalum, Niobium Int. Study Center,1992
2. Niobium in the superconducting super collider;Stienning,1988
3. Recent advances in chip type capacitors in japan;Adachi;Tantalum, Niobium Int. Study Center,1991
4. Columbium. Mineral commodity summaries;Cunningham,1991
5. Malaysia as a source of tantalum;Hasbi;Ta-Nb Int. Study Center,1983