@misc{indiciaef1285cd57101,
  title = {Ground-water data for Michigan, 1980},
  author = {G.C. Huffman},
  year = {1981},
  doi = {10.3133/ofr81811},
  url = {https://pubs.usgs.gov/publication/ofr81811},
  note = {Source identifier: ofr81811}
}