@misc{indiciae172dfbb53f44,
  title = {Feeding ecology of mallards wintering in Nebraska},
  author = {Dennis G. Jorde and Gary L. Krapu and R.D. Crawford},
  year = {1983},
  doi = {10.2307/3808163},
  url = {https://pubs.usgs.gov/publication/1001524},
  note = {Source identifier: 1001524}
}