@misc{indiciaeb55e3fafb518,
  title = {A summary of petroleum plays and characteristics of the Michigan basin},
  author = {Ronald R. Charpentier},
  year = {1988},
  doi = {10.3133/ofr87450r},
  url = {https://pubs.usgs.gov/publication/ofr87450R},
  note = {Source identifier: ofr87450R}
}