TY  - RPRT
TI  - Columbium (Niobium) recycling in the United States in 1998
AU  - Larry D. Cunningham
PY  - 2004
DO  - 10.3133/cir1196i
UR  - https://pubs.usgs.gov/publication/cir1196I
ID  - cir1196I
ER  -