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Control of Fort Duquesne, at the junction of the Monongahela and Allegheny Rivers, was a major
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Control of Fort Duquesne, at the junction of the M...

Pittsburgh Civic Arena
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Pittsburgh Civic Arena

United States of America
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United States of America

Drill press operator
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Drill press operator

Cars entering the Allegheny Mountain highway tunnel entrance
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Cars entering the Allegheny Mountain highway tunne...

Ladle of molten iron is poured
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Ladle of molten iron is poured

Back into production go these carloads of scrap metal
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Back into production go these carloads of scrap me...

White-hot steel pours like water
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White-hot steel pours like water

Allegheny County court house circa 1888 .
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Allegheny County court house circa 1888 .

The Cities of Pittsburgh and Allegheny; The City of Cincinna
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The Cities of Pittsburgh and Allegheny; The City o...

Sunrise in the Alleghenies
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Sunrise in the Alleghenies

Railroad Engineer Magazine: Steaming Through the Mountains 1936
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Railroad Engineer Magazine: Steaming Through the M...

Pittsburgh & Allegheny Pennsylvania 1871 1871
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Pittsburgh & Allegheny Pennsylvania 1871 1871

Royersford, Pennsylvania 1893 1893
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Royersford, Pennsylvania 1893 1893

Elizabeth & West Elizabeth Pennsylvania 1897
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Elizabeth & West Elizabeth Pennsylvania 1897

B & O Railroad Coal Train
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B & O Railroad Coal Train