Allegheny County, Pennsylvania:
Transportation and Industry
Linkpendium > Genealogy > USA > Pennsylvania > Allegheny County > Transportation and Industry
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Allegheny County Bridges (Source: Historic Bridges of the United States)
Allegheny County Coal Mine Index
Allegheny County, Pennsylvania (Source: Historic Bridges of Michigan and Elsewhere)
American Axe & Tool Company
American Hardware & Supply Company
Bridges and Tunnels of Allegheny County and Pittsburgh, PA
Building histories of Allegheny County (Source: Philadelphia Architects and Buildings Project)
Hobo's Guide to the Pennsy Chartiers Branch
The Little Stone Bridge Monroeville, Pennsylvania
Mines, Mining and Mineral Resources (Source: mindat.org - the mineral and locality database)
Patents Allegheny County, Pennsylvania (Source: Google Patents)
Pennsylvania Railroad Stations Past & Present
Pioneer Medicine in Western Pennsylvania (Source: PA's Past)
Pittsburgh and western Pennsylvania Their industries and commerce, resources and prospects (Source: PA's Past)
Pittsburgh Supermarket History (Source: Groceteria - Exploring supermarket history)
Rivers of Steel National Heritage Area
Your future in Allegheny County Published in 1947 (Source: PA's Past)
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