@misc{indiciae27da798fde13,
  title = {Pedological studies at Grays Landing terrace, Fayette County, Pennsylvania},
  author = {R. B. Jacobson},
  year = {1987},
  doi = {10.3133/ofr87128},
  url = {https://pubs.usgs.gov/publication/ofr87128},
  note = {Source identifier: ofr87128}
}