@misc{indiciaefcaf49aceb39,
  title = {Maps showing locations of holes drilled in 1949 to 1956 by U.S. Geological Survey, Jo Dandy and Monogram Mesa areas, Bull Canyon district, Montrose County, Colorado},
  author = {Donald Parker Elston and A. E. Flint and D.D. Haynes and R.M. Wallace},
  year = {1969},
  doi = {10.3133/ofr6990},
  url = {https://pubs.usgs.gov/publication/ofr6990},
  note = {Source identifier: ofr6990}
}