@misc{indiciae60b3a5155835,
  title = {Lithologic cross sections of phanerozoic rocks in the northern Midcontinent, U.S.A.},
  author = {D. N. Mugel and W. P. Pratt},
  year = {1991},
  doi = {10.3133/mf1835g},
  url = {https://pubs.usgs.gov/publication/mf1835G},
  note = {Source identifier: mf1835G}
}