@misc{indiciaef72a2023869b,
  title = {Coal combustion products},
  author = {R.S. Kalyoncu and D.W. Olson},
  year = {2001},
  doi = {10.3133/fs07601},
  url = {https://pubs.usgs.gov/publication/fs07601},
  note = {Source identifier: fs07601}
}