@misc{indiciae7febc607039a,
  title = {Density and fledging success of grassland birds in Conservation Reserve Program fields in North Dakota and west-central Minnesota},
  author = {Rolf R. Koford},
  year = {1999},
  url = {https://pubs.usgs.gov/publication/1001737},
  note = {Source identifier: 1001737}
}