@misc{indiciaed0e63a59205f,
  title = {Waterfowl density on agricultural fields managed to retain water in winter},
  author = {D.J. Twedt and C.O. Nelms},
  year = {1999},
  url = {https://pubs.usgs.gov/publication/5223865},
  note = {Source identifier: 5223865}
}