@misc{indiciaee1c761dec776,
  title = {Distribution of populations and hunting kill of the canvasback},
  author = {R. E. Stewart and A. D. Geis and C.D. Evans},
  year = {1958},
  doi = {10.2307/3796822},
  url = {https://pubs.usgs.gov/publication/5220115},
  note = {Source identifier: 5220115}
}