@misc{indiciae6b47077189e8,
  title = {Geochemical data for the Weldon Spring training area and vicinity property, St. Charles County, Missouri, 1990-92},
  author = {John G. Schumacher and S. J. Sutley and J.D. Cathcart},
  year = {1993},
  doi = {10.3133/ofr93153},
  url = {https://pubs.usgs.gov/publication/ofr93153},
  note = {Source identifier: ofr93153}
}