@misc{indiciae93db0f4c8421,
  title = {Geology of the Omaha-Council Bluffs area, Nebraska-Iowa},
  author = {Robert D. Miller},
  year = {1964},
  doi = {10.3133/pp472},
  url = {https://pubs.usgs.gov/publication/pp472},
  note = {Source identifier: pp472}
}