@misc{indiciaeb52cf65a8ccc,
  title = {Geologic construction-material resources in Osborne County, Kansas},
  author = {Charles P. Walters and Larson Y. Drake},
  year = {1952},
  doi = {10.3133/cir179},
  url = {https://pubs.usgs.gov/publication/cir179},
  note = {Source identifier: cir179}
}