@misc{indiciaec59f619a845b,
  title = {Ground water for public water supply at Windigo, Isle Royale National Park, Michigan},
  author = {N.G. Grannemann and F. R. Twenter},
  year = {1982},
  doi = {10.3133/ofr82567},
  url = {https://pubs.usgs.gov/publication/ofr82567},
  note = {Source identifier: ofr82567}
}