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Pittsburgh's Bridges by Helen Wilson, Todd Wilson Pe

130 pages missing pub info (view editions)

nonfiction art history technology travel informative medium-paced
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Pittsburgh is the "City of Bridges," and what remarkable bridges they are The area's challenging topography of deep ravines and mighty rivers--the Monongahela, Allegheny, and Ohio--set the stage for engineers, architects, and contractors to conqu...

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