@misc{indiciae669ee010075d,
  title = {Geologic field trip guide for Cenozoic stratigraphy of southwestern Washington},
  author = {John M. Armentrout},
  year = {1980},
  doi = {10.3133/ofr80362},
  url = {https://pubs.usgs.gov/publication/ofr80362},
  note = {Source identifier: ofr80362}
}