@misc{indiciae975a38cb929b,
  title = {Geology of the Precambrian W (lower Precambrian) rocks in western Gogebic County, Michigan},
  author = {Robert Gordon Schmidt},
  year = {1976},
  doi = {10.3133/b1407},
  url = {https://pubs.usgs.gov/publication/b1407},
  note = {Source identifier: b1407}
}