@misc{indiciae93d8aeefa2c8,
  title = {Preliminary geologic map of the west half of the Vancouver (Wa.-Ore.) 1° x 2° quadrangle, Oregon},
  author = {Ray E. Wells and A. R. Niem and N. S. MacLeod and P. D. Snavely and W. A. Niem},
  year = {1983},
  doi = {10.3133/ofr83591},
  url = {https://pubs.usgs.gov/publication/ofr83591},
  note = {Source identifier: ofr83591}
}