@misc{indiciae092f2ba8e029,
  title = {Niobium (columbium) and titanium at Magnet Cove and Potash Sulphur Springs, Arkansas},
  author = {Verne Charles Fryklund and R. S. Harner and E.P. Kaiser},
  year = {1953},
  doi = {10.3133/ofr5374},
  url = {https://pubs.usgs.gov/publication/ofr5374},
  note = {Source identifier: ofr5374}
}