@misc{indiciae5f63c81b9318,
  title = {Preliminary interpretation of vertical electrical-resistivity soundings in the Saginaw Valley, Michigan},
  author = {R.J. Mandle and David B. Westjohn},
  year = {1987},
  doi = {10.3133/ofr87474},
  url = {https://pubs.usgs.gov/publication/ofr87474},
  note = {Source identifier: ofr87474}
}