@misc{indiciae16c7aba4fa1f,
  title = {Persistence and changes in bioavailability of dieldrin, DDE and heptachlor epoxide in earthworms over 45 years},
  author = {W. Nelson Beyer and Robert W. Gale},
  year = {2012},
  doi = {10.1007/s13280-012-0340-z},
  url = {https://pubs.usgs.gov/publication/70042981},
  note = {Source identifier: 70042981}
}