@misc{indiciaee3652b7397aa,
  title = {Science, population ecology, and the management of the American black duck},
  author = {James D. Nichols},
  year = {1991},
  doi = {10.2307/3809533},
  url = {https://pubs.usgs.gov/publication/5222981},
  note = {Source identifier: 5222981}
}