@misc{indiciaed40fb18289b8,
  title = {Population declines in North American birds that migrate to the neotropics},
  author = {C.S. Robbins and J.R. Sauer and R.S. Greenberg and Sam Droege},
  year = {1989},
  url = {https://pubs.usgs.gov/publication/5222298},
  note = {Source identifier: 5222298}
}