@misc{indiciaec8c60b531f41,
  title = {Preliminary geologic map of the Clear Lake SE Quadrangle, Skagit County, Washington},
  author = {David P. Dethier and John T. Whetten and Paul R. Carroll},
  year = {1980},
  doi = {10.3133/ofr80303},
  url = {https://pubs.usgs.gov/publication/ofr80303},
  note = {Source identifier: ofr80303}
}