@misc{indiciae2838f5638473,
  title = {Preliminary geologic map of the Hebo quadrangle, Tillamook and Yamhill Counties, Oregon},
  author = {Parke Detweiler Snavely and N. S. NacLeod and Diane L. Minasian},
  year = {1993},
  doi = {10.3133/ofr93302},
  url = {https://pubs.usgs.gov/publication/ofr93302},
  note = {Source identifier: ofr93302}
}