@misc{indiciaeb44e06bd0361,
  title = {Niobium-rich minerals from the Sheep Creek carbonatite-related deposits, Montana, USA},
  author = {Christopher Gammons and Heather A. Lowers and Jay M. Thompson},
  year = {2025},
  url = {https://pubs.usgs.gov/publication/70277412},
  note = {Source identifier: 70277412}
}