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  • Original Format = Book
  • Date = 1914
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Iron_Ores
Iron ores : their occurrence, valuation, and control / by Edwin C. Eckel.
Iron ores.
xvii, 430 pages : illustrations, maps 24 cm.
The Pittsburgh district civic frontage
The Pittsburgh district civic frontage / edited by Paul Underwood Kellogg.
Pittsburgh (Pa.) -- Social conditions -- 20th century., Civic improvement -- Pennsylvania -- Pittsburgh., Sanitation -- Pennsylvania -- Pittsburgh., Housing -- Pennsylvania -- Pittsburgh., Working class -- Dwellings -- Pennsylvania -- Pittsburgh., Working class -- Pennsylvania -- Pittsburgh -- Social conditions -- 20th century.
xviii, 554 pages : illustrations, maps 24 cm.