@misc{indiciae784d64975603,
  title = {Preliminary map showing surficial deposits in the north half of the Ovando Quadrangle, Powell County, Montana},
  author = {Irving Jerome Witkind},
  year = {1977},
  doi = {10.3133/ofr77196},
  url = {https://pubs.usgs.gov/publication/ofr77196},
  note = {Source identifier: ofr77196}
}