@misc{indiciaea55ec568f6fc,
  title = {Contributions to the hydrology of the United States, 1929},
  author = {Nathan C. Grover},
  year = {1930},
  doi = {10.3133/wsp636},
  url = {https://pubs.usgs.gov/publication/wsp636},
  note = {Source identifier: wsp636}
}