@misc{indiciaee08e974a8461,
  title = {Geology and zinc-lead deposits in the Catfish Creek area, Dubuque County, Iowa},
  author = {C. Erwin Brown and Jesse W. Whitlow and Percy Crosby},
  year = {1957},
  doi = {10.3133/mf116},
  url = {https://pubs.usgs.gov/publication/mf116},
  note = {Source identifier: mf116}
}