@misc{indiciae6a9ab5293b24,
  title = {Barite nodules in Devonian shale and mudstone of western Virginia},
  author = {Sandra H. Clark and Elwin L. Mosier},
  year = {1989},
  doi = {10.3133/b1880},
  url = {https://pubs.usgs.gov/publication/b1880},
  note = {Source identifier: b1880}
}