@misc{indiciae0584bd8c7b67,
  title = {Mercury and other element exposure to tree swallows (Tachycineta bicolor) nesting on Lostwood National Wildlife Refuge, North Dakota},
  author = {T. W. Custer and Christine M. Custer and K. M. Johnson and D. J. Hoffman},
  year = {2008},
  url = {https://pubs.usgs.gov/publication/5224895},
  note = {Source identifier: 5224895}
}