@misc{indiciae3e9ca7cf30dc,
  title = {Preliminary geologic map and physical properties for the Englewood Quadrangle; Denver, Arapahoe, and Adams counties, Colorado},
  author = {Ralph R. Shroba},
  year = {1977},
  doi = {10.3133/ofr77862},
  url = {https://pubs.usgs.gov/publication/ofr77862},
  note = {Source identifier: ofr77862}
}