@misc{indiciaed842394b5dc7,
  title = {Geochemistry of bedrock units in Missouri and parts of adjacent states},
  author = {Jon J. Connor and Richard John Ebens},
  year = {1980},
  doi = {10.3133/pp954f},
  url = {https://pubs.usgs.gov/publication/pp954F},
  note = {Source identifier: pp954F}
}