@misc{indiciae39d142f4caa1,
  title = {State hydrologic unit maps},
  author = {P. R. Seaber and F.P. Kapinos and G.L. Knapp},
  year = {1984},
  doi = {10.3133/ofr84708},
  url = {https://pubs.usgs.gov/publication/ofr84708},
  note = {Source identifier: ofr84708}
}