@misc{indiciaed630c01a069f,
  title = {Trends in metals in urban and reference lake sediments across the United States, 1970 to 2001},
  author = {B.J. Mahler and P. C. Van Metre and E. Callender},
  year = {2006},
  doi = {10.1897/05-459r.1},
  url = {https://pubs.usgs.gov/publication/70028424},
  note = {Source identifier: 70028424}
}