Atlas of Philadelphia and environs : from official records, private plans, and actual surveys based upon plans deposited in the Department of Surveys surveyed [and] published under... by Hopkins, Griffith Morgan.

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Economic development within the Philadelphia metropolitan area / by Summers, Anita A.

“…Philadelphia Metropolitan Area (Pa.) Economic conditions.…”

Encyclopedia of greater Philadelphia. by Rutgers University--Camden. Mid-Atlantic Regional Center for the Humanities

“…Philadelphia Metropolitan Area (Pa.) Encyclopedia.…”
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Econometric analysis of regional systems : explorations in model building and policy analysis / by Glickman, Norman J.

“…Philadelphia Metropolitan Area (Pa.) Economic conditions Econometric models.…”

The Divided metropolis : social and spatial dimensions of Philadelphia, 1800-1975 /

Sherman Thackara collection

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