Coking coal of the United States—Modern and historical coking coal mining locations and chemical, rheological, petrographic, and other data from modern samples

@inproceedings{Trippi2021CokingCO,
  title={Coking coal of the United States—Modern and historical coking coal mining locations and chemical, rheological, petrographic, and other data from modern samples},
  author={Michael H. Trippi and Leslie F. Ruppert and Cortland F. Eble and James C. Hower},
  year={2021}
}