@misc{indiciae265738112cb7,
  title = {Geologic map of the Mount Harvard quadrangle, Chaffee and Gunnison Counties, Colorado},
  author = {M. R. Brock and Fred Barker},
  year = {1972},
  doi = {10.3133/gq952},
  url = {https://pubs.usgs.gov/publication/gq952},
  note = {Source identifier: gq952}
}