@misc{indiciae80121d777970,
  title = {Thick-skinned, south-verging backthrusting in the Felch and Calumet troughs area of the Penokean Orogen, northern Michigan},
  author = {J. S. Klasner and P. K. Sims},
  year = {1993},
  doi = {10.3133/b1904l},
  url = {https://pubs.usgs.gov/publication/b1904L},
  note = {Source identifier: b1904L}
}