TY  - RPRT
TI  - A rapid quantitative chemical procedure for analysis for niobium
AU  - F. N. Ward
AU  - A. P. Marranzino
PY  - 1954
DO  - 10.1126/science.119.3097.655.b
UR  - https://pubs.usgs.gov/publication/70011032
ID  - 70011032
ER  -