@misc{indiciaed0bc85dbe46d,
  title = {The Reinhardt Thiessen coal thin-section slide collection of the U.S. Geological Survey; catalog and notes},
  author = {James Morton Schopf and Orrin G. Oftedahl},
  year = {1976},
  doi = {10.3133/b1432},
  url = {https://pubs.usgs.gov/publication/b1432},
  note = {Source identifier: b1432}
}