@misc{indiciae5234a5f8a8be,
  title = {Body size and condition of male mallard during mid-winter in North Dakota, USA},
  author = {R.E. Olsen and R. R. Cox},
  year = {2003},
  doi = {10.1675/1524-4695(2003)026[0449:bsacom]2.0.co;2},
  url = {https://pubs.usgs.gov/publication/1001826},
  note = {Source identifier: 1001826}
}