@misc{indiciae657312e3cdd7,
  title = {Evaluation of aerial transects for counting winter mallards},
  author = {Kenneth J. Reinecke and Michael W. Brown and James R. Nassar},
  year = {1992},
  doi = {10.2307/3808867},
  url = {https://pubs.usgs.gov/publication/5223021},
  note = {Source identifier: 5223021}
}