@misc{indiciaee435c49cca12,
  title = {Detailed sections from auger holes in the Bowling Green, Penola, Sparta, and Supply quadrangles, Virginia},
  author = {R. E. Weems and D.S. Powars and A.M. Clark},
  year = {1993},
  doi = {10.3133/ofr93581},
  url = {https://pubs.usgs.gov/publication/ofr93581},
  note = {Source identifier: ofr93581}
}