@misc{indiciaefea6a1374fce,
  title = {The potential for diamond-bearing kimberlite in northern Michigan and Wisconsin},
  author = {William F. Cannon and M.G. Mudrey},
  year = {1981},
  doi = {10.3133/cir842},
  url = {https://pubs.usgs.gov/publication/cir842},
  note = {Source identifier: cir842}
}