@misc{indiciae116dca709a37,
  title = {An account of the geology of Oregon City, Oregon, with notes on adajacent West Linn and Willamette, Oregon},
  author = {Donald Eldon Trimble},
  year = {1954},
  doi = {10.3133/ofr54316},
  url = {https://pubs.usgs.gov/publication/ofr54316},
  note = {Source identifier: ofr54316}
}