@misc{indiciae9d19afc6885d,
  title = {Description and preliminary map of airborne electromagnetic survey of parts of Iron, Baraga, and Dickinson Counties, Michigan},
  author = {William D. Heran and Bruce D. Smith},
  year = {1980},
  doi = {10.3133/ofr80297},
  url = {https://pubs.usgs.gov/publication/ofr80297},
  note = {Source identifier: ofr80297}
}