@misc{indiciae96f0f4732561,
  title = {Overburden related to type of bedrock and engineering characteristics of the bedrock, Knox County, Tennessee},
  author = {Larry D. Harris and J. M. Kellberg},
  year = {1972},
  doi = {10.3133/i767j},
  url = {https://pubs.usgs.gov/publication/i767J},
  note = {Source identifier: i767J}
}