@misc{indiciae606d21548107,
  title = {A decoy trap for breeding-season mallards in North Dakota},
  author = {David E. Sharp and John T. Lokemoen},
  year = {1987},
  doi = {10.2307/3801731},
  url = {https://pubs.usgs.gov/publication/1001263},
  note = {Source identifier: 1001263}
}