@misc{indiciaefa513fe2a8aa,
  title = {Improving population estimates of threatened spectacled eiders: Correcting aerial counts for visibility bias},
  author = {Tyler Lewis and Michael Swaim and Joel A. Schmutz and Julian Fischer},
  year = {2019},
  doi = {10.3354/esr00959},
  url = {https://pubs.usgs.gov/publication/70204210},
  note = {Source identifier: 70204210}
}