@misc{indiciae5c8143b226f5,
  title = {Lake Ellen kimberlite, Michigan, U.S.A.},
  author = {E. S. McGee and B.C. Hearn},
  year = {1983},
  doi = {10.3133/ofr83156},
  url = {https://pubs.usgs.gov/publication/ofr83156},
  note = {Source identifier: ofr83156}
}