@misc{indiciae3d6a09e02878,
  title = {Preliminary geologic map of the Slick Rock district, San Miguel and Dolores Counties, Colorado},
  author = {D. R. Shawe and G. C. Simmons and W.B. Rogers},
  year = {1961},
  doi = {10.3133/mf203},
  url = {https://pubs.usgs.gov/publication/mf203},
  note = {Source identifier: mf203}
}