@misc{indiciaecd6e4888ebe3,
  title = {Preliminary geologic map of the Nulato and Kateel Rivers area, Alaska},
  author = {R. S. Patton W. W. Bickel},
  year = {1957},
  doi = {10.3133/i249},
  url = {https://pubs.usgs.gov/publication/i249},
  note = {Source identifier: i249}
}