@misc{indiciae2149a3c0eb11,
  title = {U.S. Geological Survey-Missouri Geological Survey symposium; Mineral-resource potential of the Midcontinent; program and abstracts, St. Louis, Missouri, April 11-12, 1989},
  author = {Martin B. Goldhaber},
  year = {1990},
  doi = {10.3133/cir1043},
  url = {https://pubs.usgs.gov/publication/cir1043},
  note = {Source identifier: cir1043}
}