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Coal analyses from twenty-five laboratories compared

Annual report of research and technologic work on coal, fiscal year 1937

Annual report of research and technologic work on coal fiscal year 1938

Developments in coal research and technology in 1937 and 1938

Annual report of research and technologic work on coal, fiscal year 1940

Annual report of research and technologic work on coal, fiscal year 1939

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

Annual report of research and technologic work on coal :fiscal year 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

Annual report of research and technologic work on coal :fiscal year 1949


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