@misc{indiciaeec6006cae921,
  title = {Regional potential of selected Paleozoic carbonate units in the northern Midcontinent for undiscovered mississippi valley-type deposits},
  author = {Walden P. Pratt},
  year = {1995},
  doi = {10.3133/b1989g},
  url = {https://pubs.usgs.gov/publication/b1989G},
  note = {Source identifier: b1989G}
}