| American Society
for Testing and Materials |
| U.S. Bureau of Mines |
| USGS Coal Availability
Studies |
| Coal Reserves Data
Base |
| BOM Coal Recoverability
Studies |
| U.S. Department of
Energy |
| demonstrated reserve
base |
| Energy Information
Administration |
| Federal Energy Regulatory
Commission |
| geographic information
systems |
| Illinois State Geological
Survey |
| National Coal Resource
Assessment |
| National Coal Resource
Data System |
| run of mine |
| U.S. Geological Survey |