@misc{indiciaef41da0e24ede,
  title = {Shift in Global Tantalum Mine Production, 2000–2014},
  author = {Donald I. Bleiwas and John F. Papp and Thomas R. Yager},
  year = {2015},
  doi = {10.3133/fs20153079},
  url = {https://pubs.usgs.gov/publication/fs20153079},
  note = {Source identifier: fs20153079}
}