@misc{indiciae525f1cc3f5df,
  title = {Preliminary investigation of ground-water occurrences in the Weldon Spring area, St. Charles County, Missouri},
  author = {Claude M. Roberts and C.V. Theis},
  year = {1951},
  doi = {10.3133/ofr821008},
  url = {https://pubs.usgs.gov/publication/ofr821008},
  note = {Source identifier: ofr821008}
}