@misc{indiciae07031db763cf,
  title = {General availability of ground water from bedrock in Michigan},
  author = {F. R. Twenter},
  year = {1966},
  doi = {10.3133/ofr66135},
  url = {https://pubs.usgs.gov/publication/ofr66135},
  note = {Source identifier: ofr66135}
}