@misc{indiciae9925558fea35,
  title = {Plan of study for the regional aquifer systems analysis of the Michigan Basin},
  author = {Richard J. Mandle},
  year = {1986},
  doi = {10.3133/ofr86494},
  url = {https://pubs.usgs.gov/publication/ofr86494},
  note = {Source identifier: ofr86494}
}