@misc{indiciaefc27ba5424c2,
  title = {Impregnating Coal With Calcium Carbonate},
  author = {Sharma, Pramod K. and Voecks, Gerald E. and Gavalas, George R.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910000636},
  note = {Source identifier: 19910000636}
}