@misc{indiciaeec65b6d29535,
  title = {Map showing Precambrian geology of parts of Iron and Dickinson Counties, Michigan, Florence and Marinette Counties, Wisconsin},
  author = {Carl E. Dutton and Reta E. Linebaugh},
  year = {1960},
  doi = {10.3133/ofr6045},
  url = {https://pubs.usgs.gov/publication/ofr6045},
  note = {Source identifier: ofr6045}
}