@misc{indiciae7dba4b2fcf10,
  title = {Summary report on the geology and mineral resources of the Huron, Seney, Michigan Islands, Green Bay, and Gravel Island National Wildlife Refuges of Michigan and Wisconsin},
  author = {Carl E. Dutton},
  year = {1968},
  doi = {10.3133/b1260i},
  url = {https://pubs.usgs.gov/publication/b1260I},
  note = {Source identifier: b1260I}
}