@misc{indiciae5e6fe2ed37a6,
  title = {The Texture of Mississippian, Upper Devonian, and Lower Pennsylvanian Sandstones in the Appalachian Basin},
  author = {Gordon Rittenhouse and Elaine Cather},
  year = {1946},
  doi = {10.3133/ofr461},
  url = {https://pubs.usgs.gov/publication/ofr461},
  note = {Source identifier: ofr461}
}