Carnegie Library of Pittsburgh - Pittsburgh Iron & Steel Heritage

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The gas, coal and iron interests of western Pennsylvania
General catalog number one / Koppel Industrial Car and Equipment Company.
General catalogue 1911. Frick Co.
General catalogue 1912. Frick Co.
Geo Track construction
The great strike
Great_Steel_Strike
Greater Pittsburgh : the  iron city
Greater Pittsburgh exposition, 1895
Greater Pittsburgh's commercial and industrial development
Gruson's chilled cast-iron armour
Heat treatment furnaces
Heroult electric furnaces
High-speed automatic cut-off engine
High speed forging presses
High speed saws
A history of manufactures in the Ohio Valley to the year 1860