@misc{indiciaeffffb15807f0,
  title = {Reconnaissance geologic map of the Eagle Rock quadrangle, Crook County, Oregon},
  author = {A. C. Waters and R.H. Vaughan},
  year = {1968},
  doi = {10.3133/i540},
  url = {https://pubs.usgs.gov/publication/i540},
  note = {Source identifier: i540}
}