@misc{indiciaee83d7f0855cd,
  title = {Development and maturation of primary feathers of redhead ducklings},
  author = {M.G. Smart},
  year = {1965},
  doi = {10.2307/3798053},
  url = {https://pubs.usgs.gov/publication/5220168},
  note = {Source identifier: 5220168}
}