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The source Economic Situation of Negroes in the United States compares median wages andsalary income for white race and non-white races with breakouts by . Provides datafor the years 1939 1947 1957 1958 1959 1960.
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In 1899 the United States led the world and supplied nearly 32 per cent. of itsproduction. The average price of bituminous coal at the mines in the United States pershort ton varied between 1893 and 1900 from $0.80 to $1.04; while that of anthracite was
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