@misc{indiciae670be7dd6501,
  title = {Classification of grassland communities in the Northern Great Plains and assessment of their value as habitats for breeding birds},
  author = {Harold A. Kantrud and Russell L. Kologiski},
  year = {1977},
  url = {https://pubs.usgs.gov/publication/70119854},
  note = {Source identifier: 70119854}
}