@misc{indiciaed568b1e3b56e,
  title = {Population trends of North American sea ducks based on Christmas Bird Count and Breeding Bird Survey data},
  author = {D.K. Niven and J.R. Sauer and G.S. Butcher},
  year = {2005},
  url = {https://pubs.usgs.gov/publication/5211320},
  note = {Source identifier: 5211320}
}