@misc{indiciaecdf284e75b74,
  title = {Evaporite karst of northern lower Michigan},
  author = {T. J. Black},
  year = {1997},
  doi = {10.1007/bf03175805},
  url = {https://pubs.usgs.gov/publication/70019199},
  note = {Source identifier: 70019199}
}