@misc{indiciae9201d3f5b2fd,
  title = {Environment of deposition of CaCO3 in Elk Lake, Minnesota},
  author = {Walter E. Dean and R.O. Megard},
  year = {1993},
  doi = {10.1130/spe276-p97},
  url = {https://pubs.usgs.gov/publication/70207737},
  note = {Source identifier: 70207737}
}