@misc{indiciae69423bf62133,
  title = {Breeding-ground habitat conditions and the survival of mallards},
  author = {James D. Nichols and Richard S. Pospahala and James E. Hines},
  year = {1982},
  doi = {10.2307/3808410},
  url = {https://pubs.usgs.gov/publication/5221764},
  note = {Source identifier: 5221764}
}