@misc{indiciae5ee198b65ffc,
  title = {Average composition of agriculture soils in Missouri counties},
  author = {Ronald R. Tidball},
  year = {1974},
  doi = {10.3133/ofr7466},
  url = {https://pubs.usgs.gov/publication/ofr7466},
  note = {Source identifier: ofr7466}
}