@misc{indiciae590345d55b34,
  title = {Ecoregions and subregions of the United States},
  author = {Robert G. Bailey and Peter Avers and Thomas King and W. Henry McNab},
  year = {1994},
  doi = {10.3133/70250183},
  url = {https://pubs.usgs.gov/publication/70250183},
  note = {Source identifier: 70250183}
}