@misc{indiciaebebcefb9a52d,
  title = {Evaluation of a nasal marker for ducks},
  author = {R. J. Greenwood},
  year = {1977},
  doi = {10.2307/3800536},
  url = {https://pubs.usgs.gov/publication/1001597},
  note = {Source identifier: 1001597}
}