@misc{indiciaeac562153cde1,
  title = {Reconnaissance geologic map of the Cascade Quadrangle, El Paso County, Colorado},
  author = {Reinhard A. Wobus and Glenn R. Scott},
  year = {1977},
  doi = {10.3133/ofr77138},
  url = {https://pubs.usgs.gov/publication/ofr77138},
  note = {Source identifier: ofr77138}
}