@misc{indiciae57fafbf0cbff,
  title = {Exposure of waterfowl to lead: a nationwide survey of residues in wing bones of seven species, 1972-73},
  author = {Rey C. Stendell and Robert I. Smith and Kenneth P. Burnham and Robert E. Christensen},
  year = {1979},
  url = {https://pubs.usgs.gov/publication/ssrw223},
  note = {Source identifier: ssrw223}
}