The Mentor: The Story of Coal, vol. 6, Num. 6, Serial No. 154, May 1, 1918
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Contents
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Language
English
ISBN
Unknown
THE MENTOR 1918.05.01, No. 154, The Story of Coal
THE MINER
THE STORY OF COAL The Origin of Coal
THE STORY OF COAL The Coal Fields of the United States
THE STORY OF COAL Handling Coal
THE STORY OF COAL Coal Products
THE STORY OF COAL The Smoke Problem
THE STORY OF COAL Safety in Coal Mines
THE STORY OF COAL
Kinds of Coal
The Modern History of Coal
How Coal is Mined
The World’s Coal Resources
SUPPLEMENTARY READING
THE OPEN LETTER
IN THE HIGH SCHOOL
The Mentor Association
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