@misc{indiciae7c244c2330f7,
  title = {Letters received by the United States Geological Survey, 1879-1901},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1964},
  doi = {10.3133/1479},
  url = {https://pubs.usgs.gov/publication/1479},
  note = {Source identifier: 1479}
}