@misc{indiciaef369bc31112d,
  title = {Surficial geology of the Council Bluffs, Iowa, area},
  author = {Robert D. Miller},
  year = {1956},
  doi = {10.3133/ofr5679},
  url = {https://pubs.usgs.gov/publication/ofr5679},
  note = {Source identifier: ofr5679}
}