@misc{indiciaed82b912bcebe,
  title = {A rapid quantitative chemical procedure for analysis for niobium},
  author = {F. N. Ward and A. P. Marranzino},
  year = {1954},
  doi = {10.1126/science.119.3097.655.b},
  url = {https://pubs.usgs.gov/publication/70011032},
  note = {Source identifier: 70011032}
}