@misc{indiciae1ae1b7c6fbb7,
  title = {Geologic map of the Skykomish River 30- by 60-minute quadrangle, Washington},
  author = {R. W. Tabor and D.A. Frizzell and D. B. Booth and R. B. Waitt and J. T. Whetten and R. E. Zartman},
  year = {1993},
  doi = {10.3133/i1963},
  url = {https://pubs.usgs.gov/publication/i1963},
  note = {Source identifier: i1963}
}