Search U.S. government technical reports digitized or harvested by TRAIL.
Bibliography of Bureau of Mines investigations of coal and its products :1935 to 1940
Bureau of Mines research on the hydrogenation and liquefaction of coal and lignite
Annual report of research and technologic work on coal :fiscal year 1944
Analyses of Tennessee coals (including Georgia).
Annual report of research and technologic work on coal :fiscal year 1945
Coal-research activities of the Bureau of Mines
Bibliography of Bureau of Mines investigations of coal and its products,1940 to 1945
Annual report of research and technologic work on coal :fiscal year 1947
Annual report of research and technologic work on coal :fiscal year 1948
Achievements in mine safety research and problems yet to be solved
Annual report of research and technologic work on coal :fiscal year 1949
Annual report of research and technologic work on coal :fiscal year 1950