@misc{indiciaecddef1c344cd,
  title = {Notes on the Promontory district, Utah},
  author = {B. S. Butler and V. C. Heikes},
  year = {1917},
  doi = {10.3133/b640a},
  url = {https://pubs.usgs.gov/publication/b640A},
  note = {Source identifier: b640A}
}