@misc{indiciae7cdac252ad01,
  title = {Assessing the coal resources of the United States},
  author = {Harold J. Gluskoter and R. M. Flores and J. Hatch and M.A. Kirschbaum and L.F. Ruppert and Peter D. Warwick},
  year = {1996},
  doi = {10.3133/fs15796},
  url = {https://pubs.usgs.gov/publication/fs15796},
  note = {Source identifier: fs15796}
}