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WikiPedia: Allentown,_Pennsylvania http://www.allentownpa.gov/ http://2010.census.gov/news/releases/operations/cb... http://www.lehighcounty.org/index.cfm?doc=about_lc... //tools.wmflabs.org/geohack/geohack.php?language=v... https://web.archive.org/web/20110312142513/http://...