Report on the operations of the coal-testing plant of the United States Geological Survey at the Louisiana Purchase Exposition, Saint Louis, Missouri, 1904: Part I.--Field work, classification of coals, chemical work

10.3133/pp48 ◽  
1906 ◽  
Author(s):  
E.W. Parker ◽  
J.A. Holmes ◽  
M.R. Campbell
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