@misc{indiciae34eae35ee71b,
  title = {Instructions relating to the work of the United States Geological Survey to take effect May 1, 1903},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1903},
  doi = {10.3133/70159137},
  url = {https://pubs.usgs.gov/publication/70159137},
  note = {Source identifier: 70159137}
}