@misc{indiciaeb521e93507d3,
  title = {Analog records from an airborne electromagnetic and magnetic survey of parts of the Upper Peninsula of Michigan},
  author = {William D. Heran and Geoterrex Limited},
  year = {1982},
  doi = {10.3133/ofr8260b},
  url = {https://pubs.usgs.gov/publication/ofr8260B},
  note = {Source identifier: ofr8260B}
}