@misc{indiciaee17faa727768,
  title = {The gneisses, gabbro schists, and associated rocks of southwestern Minnesota},
  author = {C.W. Hall},
  year = {1899},
  doi = {10.3133/b157},
  url = {https://pubs.usgs.gov/publication/b157},
  note = {Source identifier: b157}
}