Search U.S. government technical reports digitized or harvested by TRAIL.
The Constituents of Coal Soluble in Phenol
Analyses of Mine and Car Samples of Coal Collected in the Fiscal Years 1911 to 1913
Graphic Studies of Ultimate Analyses of Coals
Analyses of Mine and Car Samples of Coal Collected in the Fiscal Years 1913 to 1916
Analyses of Washington Coals: Supplement to Technical Paper 491
Analyses of West Virginia Coals
Washing Characteristics of the Pittsburgh Coal in a High-Sulfur Area in Greene County, Pennsylvania
Analyses of Michigan, North Dakota, South Dakota and Texas Coals