@misc{indiciae0e09497d3c4a,
  title = {Geology of central Dickinson County, Michigan},
  author = {H. L. James and L. D. Clark and C.A. Lamey and F.J. Pettijohn},
  year = {1961},
  doi = {10.3133/pp310},
  url = {https://pubs.usgs.gov/publication/pp310},
  note = {Source identifier: pp310}
}