@misc{indiciae9b329e285117,
  title = {Correlation of Precambrian rocks of the Lake Superior region, United States},
  author = {G. B. Morey and W. R. Van Schmus},
  year = {1988},
  doi = {10.3133/pp1241f},
  url = {https://pubs.usgs.gov/publication/pp1241F},
  note = {Source identifier: pp1241F}
}