Search
Search U.S. government technical reports digitized or harvested by TRAIL.
Keyword Search
4 results returnedSearch results
- Carbonization characteristics of some north-central United States lignites
- Thickness of bituminous-coal and lignite seams at all mines and thickness of overburden at strip mines in the United States in 1955
- Thickness of bituminous coal and lignite seams mined in 1960
- Strippable reserves of bituminous coal and lignite in the United States