@misc{indiciae868c10ab1230,
  title = {Summary of ground-water hydrological data in Michigan in 1970},
  author = {G.C. Huffman and T. Thompson},
  year = {1971},
  doi = {10.3133/ofr72173},
  url = {https://pubs.usgs.gov/publication/ofr72173},
  note = {Source identifier: ofr72173}
}