@misc{indiciae33193779d175,
  title = {Problems with applying topographically driven flow to genesis of the Upper Mississippi Valley zinc-lead district and to fluid flow in the Illinois Basin},
  author = {Charles S. Spirakis},
  year = {1995},
  doi = {10.3133/b2094c},
  url = {https://pubs.usgs.gov/publication/b2094C},
  note = {Source identifier: b2094C}
}