@misc{indiciae51ae419be5ec,
  title = {Twenty-five year trends in diving duck populations in Chesapeake Bay},
  author = {Matthew C. Perry and R. E. Munro and G.M. Haramis},
  year = {1981},
  url = {https://pubs.usgs.gov/publication/5221656},
  note = {Source identifier: 5221656}
}