@misc{indiciae3f0c4f4f0f8c,
  title = {Registers of 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 = {1949},
  doi = {10.3133/1490},
  url = {https://pubs.usgs.gov/publication/1490},
  note = {Source identifier: 1490}
}