@misc{indiciae9d25d3301bd2,
  title = {Water-resources activities of the U.S. Geological Survey in Montana, October 1987 through September 1989},
  author = {J. N. Thamke},
  year = {1989},
  doi = {10.3133/ofr89591},
  url = {https://pubs.usgs.gov/publication/ofr89591},
  note = {Source identifier: ofr89591}
}