@misc{indiciae708a09caec41,
  title = {Contributions to the hydrology of the United States, 1919},
  author = {Nathan C. Grover},
  year = {1921},
  doi = {10.3133/wsp450},
  url = {https://pubs.usgs.gov/publication/wsp450},
  note = {Source identifier: wsp450}
}