@misc{indiciaefffd71ea0af3,
  title = {Changes in breeding bird populations in North Dakota: 1967 to 1992-93},
  author = {L.D. Igl and Douglas H. Johnson},
  year = {1997},
  doi = {10.2307/4089067},
  url = {https://pubs.usgs.gov/publication/1001134},
  note = {Source identifier: 1001134}
}