Search U.S. government technical reports digitized or harvested by TRAIL.
Computer program for economic evaluations of underground bituminous coal mines
Strippable reserves of bituminous coal and lignite in the United States
A small-scale test for free-swelling index of coal /by R.F. Abernethy and J.P. Snyder.
Coal recovery from underground bituminous coal mines in the United States, by mining method
Thermal, mechanical, and physical properties of selected bituminous coals and cokes