@misc{indiciaeb1e1c2b037c7,
  title = {Preliminary geologic map of the Clear Lake NW Quadrangle, Skagit County, Washington},
  author = {John T. Whetten and David P. Dethier and Paul R. Carroll},
  year = {1980},
  doi = {10.3133/ofr80247},
  url = {https://pubs.usgs.gov/publication/ofr80247},
  note = {Source identifier: ofr80247}
}