@misc{indiciae9298805d0efd,
  title = {Surface-water and sediment quality in the Old Lead Belt, southeastern Missouri– 1988-89},
  author = {B. J. Smith and John G. Schumacher},
  year = {1993},
  doi = {10.3133/wri934012},
  url = {https://pubs.usgs.gov/publication/wri934012},
  note = {Source identifier: wri934012}
}