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Author
Allegheny County Division of Computer Services Geographic Information Systems Group
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Subject
Imagery and Base Maps
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Institution
Penn State
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Year
2002
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1. Blocks: Allegheny County, Pennsylvania
2002. Allegheny County Division of Computer Services Geographic Information Systems Group. Derived from original MAPINDX: Map Index Sheets from Block and Lot Grid of Property Assessment and based on aerial photography, showing 1983 datum ...