Search U.S. government technical reports digitized or harvested by TRAIL.
American Lignites: Geological Occurrence, Petrographic Composition, And Extractable Waxes
Castleman Basin, Garrett County, Maryland
Coal Deposits in the Deep River Field, Chatham, Lee, and Moore Counties, N.C.
Carbonization properties and petrographic composition of Hernshaw coal from Boone County, W. Va.