@misc{indiciae6000c6b09a68,
  title = {Geochemical survey Of Missouri; plans and progress for first six-month period (July-December 1969)},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1969},
  doi = {10.3133/ofr72398},
  url = {https://pubs.usgs.gov/publication/ofr72398},
  note = {Source identifier: ofr72398}
}