@misc{indiciae119cc3dd2f8f,
  title = {Iron-bearing deposits in Bossier, Caddo, and Webster Parishes, Louisiana},
  author = {E. F. Burchard},
  year = {1916},
  doi = {10.3133/b620g},
  url = {https://pubs.usgs.gov/publication/b620G},
  note = {Source identifier: b620G}
}