@misc{indiciae530eabf06617,
  title = {Surface water supply of the United States, 1921, Part III, Ohio River basin},
  author = {Nathan C. Grover},
  year = {1925},
  doi = {10.3133/wsp523},
  url = {https://pubs.usgs.gov/publication/wsp523},
  note = {Source identifier: wsp523}
}