Search U.S. government technical reports digitized or harvested by TRAIL.
Rare and uncommon chemical elements in coal
Carbonization properties and petrographic composition of Hernshaw coal from Boone County, W. Va.
International system for classifying brown coals and lignites and its application to American coals
Application of rapid methods for analyzing coal ash and related materials
Effect of sulfur retention on determined ash in lower-rank coals
Phosphorus, chlorine, sodium, and potassium in U.S. coals