@misc{indiciae0a677b681443,
  title = {Aquatic ecoregions of the conterminous United States},
  author = {J.M. Omernick},
  year = {1987},
  doi = {10.3133/70046266},
  url = {https://pubs.usgs.gov/publication/70046266},
  note = {Source identifier: 70046266}
}