@misc{indiciae25d604b62a00,
  title = {Geologic map and database of the Salem East and Turner 7.5 minute quadrangles, Marion County, Oregon: A digital database},
  author = {Terry L. Tolan and Marvin H. Beeson and Christopher B. DuRoss},
  year = {2000},
  doi = {10.3133/ofr00351},
  url = {https://pubs.usgs.gov/publication/ofr00351},
  note = {Source identifier: ofr00351}
}