@misc{indiciae08c9c638e3c6,
  title = {Geologic map of the Greenland and Rockland quadrangles, Ontonagon County, Michigan},
  author = {J. W. Whitlow},
  year = {1974},
  doi = {10.3133/mf596},
  url = {https://pubs.usgs.gov/publication/mf596},
  note = {Source identifier: mf596}
}