Search U.S. government technical reports digitized or harvested by TRAIL.
Cleaning tests of central Illinois coal
Analyses of Tennessee coals (including Georgia).
Low-gravity float-and-sink separations of bituminous-coal samples
Coal preparation practice in western Germany
Preparation characteristics of Maryland coals
Preparation characteristics of anthracites in the Santa River Valley, Peru
Froth-flotation practice in coal-preparation plants of Western Europe and Great Britain