Title: Sixth annual report of the Commissioner of Labor. 1890. Cost of production
Subjects: Bituminous coal, Coal mines and mining, Coal, Coke industry, Coke, Consumption (Economics), Cost of living, Food, Housing, Income, Industrial production, Industrial surveys, Iron and steel industry, Iron, Labor, Limestone, Steel, Wages and salaries, Cost, Statistics, United States. Department of Labor, United States