@misc{indiciae58fc655078de,
  title = {Galena-Elizabeth folio, Illinois-Iowa},
  author = {Eugene Wesley Shaw and Arthur Carleton Trowbridge},
  year = {1916},
  doi = {10.3133/gf200},
  url = {https://pubs.usgs.gov/publication/gf200},
  note = {Source identifier: gf200}
}