@misc{indiciae39ef3bc22e8f,
  title = {Nationwide residues of organochlorine compounds in wings of adult mallards and black ducks, 1979-80},
  author = {B. W. Cain},
  year = {1981},
  url = {https://pubs.usgs.gov/publication/5221721},
  note = {Source identifier: 5221721}
}