@misc{indiciae607ded35252e,
  title = {Construction materials in the Cedar Bluffs area, Trego County, Kansas},
  author = {Frank E. Byrne and Vincent B. Coombs and Charles H. Bearman},
  year = {1947},
  doi = {10.3133/cir15},
  url = {https://pubs.usgs.gov/publication/cir15},
  note = {Source identifier: cir15}
}