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The Mining Industries, 1899 - 1939 : a study of Output, Employment and Productivity
Barger, Harold, (1944)
Erzbergbau und Eisenerzaufbereitung in den USA
Zika, Hans, (1953)
Negro education in Alabama : a study in cotton and steel ; the Susan Colver Rosenberger Prize Essay, 1937
Bond, Horace Mann, (1969)