@misc{indiciaeff716c38b8e7,
  title = {The Melrose phosphate field, Montana},
  author = {R. W. Richards and J. T. Pardee},
  year = {1926},
  doi = {10.3133/b780a},
  url = {https://pubs.usgs.gov/publication/b780A},
  note = {Source identifier: b780A}
}