@misc{indiciae62dee100ff8f,
  title = {Atlas of relations between climatic parameters and distributions of important trees and shrubs in North America: Ecoregions of North America},
  author = {Robert S. Thompson and Katherine H. Anderson and Richard T. Pelltier and Sarah L. Shafer and Patrick J. Bartlein},
  year = {2007},
  doi = {10.3133/pp1650e},
  url = {https://pubs.usgs.gov/publication/pp1650E},
  note = {Source identifier: pp1650E}
}