@misc{indiciaedee91436849b,
  title = {The geochemical landscape of northwestern Wisconsin and adjacent parts of northern Michigan and Minnesota (geochemical data files)},
  author = {William F. Cannon and Laurel G. Woodruff},
  year = {2003},
  doi = {10.3133/ofr03259},
  url = {https://pubs.usgs.gov/publication/ofr03259},
  note = {Source identifier: ofr03259}
}