@misc{indiciaeb8c158accd47,
  title = {Preliminary map of bedrock geology of the Ralston Buttes quadrangle, Jefferson County, Colorado},
  author = {D. M. Sheridan and C. H. Maxwell and A. L. Albee and Richard Van Horn},
  year = {1958},
  doi = {10.3133/mf179},
  url = {https://pubs.usgs.gov/publication/mf179},
  note = {Source identifier: mf179}
}