@misc{indiciaecbab4e65f636,
  title = {Geochemical survey of Missouri, plans and progress for seventh six-month period (June-December 1972)},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1969},
  doi = {10.3133/ofr73326},
  url = {https://pubs.usgs.gov/publication/ofr73326},
  note = {Source identifier: ofr73326}
}