@misc{indiciae852deea34b62,
  title = {A New Map of Standardized Terrestrial Ecosystems of the Conterminous United States},
  author = {Roger G. Sayre and Patrick Comer and Harumi Warner and Jill Cress},
  year = {2009},
  doi = {10.3133/pp1768},
  url = {https://pubs.usgs.gov/publication/pp1768},
  note = {Source identifier: pp1768}
}