@misc{indiciae4d408a7a9ffc,
  title = {Principal facts for 29 gravity stations in the Boulder and Jefferson City quadrangles, Montana},
  author = {J. H. Hassemer},
  year = {1986},
  doi = {10.3133/ofr86214},
  url = {https://pubs.usgs.gov/publication/ofr86214},
  note = {Source identifier: ofr86214}
}