@misc{indiciae289c32b8d7f2,
  title = {A statistical analysis of the larger Silurian reefs in the northern part of the Lower Peninsula of Michigan},
  author = {Ronald R. Charpentier},
  year = {1989},
  doi = {10.3133/ofr89216},
  url = {https://pubs.usgs.gov/publication/ofr89216},
  note = {Source identifier: ofr89216}
}