@misc{indiciaec917324ccbc4,
  title = {Geology and oil and gas prospects of the Huntley field, Montana},
  author = {E.T. Hancock},
  year = {1920},
  doi = {10.3133/b711g},
  url = {https://pubs.usgs.gov/publication/b711G},
  note = {Source identifier: b711G}
}