@misc{indiciaea58daa4d00af,
  title = {Construction materials in Ellis County, Kansas},
  author = {Frank E. Byrne and Vincent Bruce Coombs and Charles H. Bearman},
  year = {1949},
  doi = {10.3133/cir30},
  url = {https://pubs.usgs.gov/publication/cir30},
  note = {Source identifier: cir30}
}