@misc{indiciae81992a4593b1,
  title = {Soil geochemical signature of urbanization and industrialization – Chicago, Illinois, USA},
  author = {W.F. Cannon and John D. Horton},
  year = {2009},
  doi = {10.1016/j.apgeochem.2009.04.023},
  url = {https://pubs.usgs.gov/publication/70037001},
  note = {Source identifier: 70037001}
}