@misc{indiciae0e2a2400af32,
  title = {U.S. Geological Survey coal exploratory drill program; utilization of samples from a typical drill-core},
  author = {Gary B. Schneider},
  year = {1978},
  doi = {10.3133/ofr78344},
  url = {https://pubs.usgs.gov/publication/ofr78344},
  note = {Source identifier: ofr78344}
}