1895 Atlas: Pennsylvania
1914 Farm and Business Directory of Lebanon County
Allentown 1899 City Directory
American Local History Network: Pennsylvania
Annals of Pennsylvania, From the Discovery of the Delaware ... 1609-1682 (1850)
Archives Records Information Access System (ARIAS)
Biographical Encyclopedia of Pennsylvania of the Nineteenth Century (1874)
Broad Street, Penn Square and the Park (1871)
Butler County 1916 Farm Directory
Centennial Exposition, Philadelphia, 1876
Centre County Historical Society
Centre County Naturalization Records 1802-1929
Civil War Regimental History: Pennsylvania
Civil War Rosters: Pennsylvania
Clearfield 1928 City Directory
Cyndi's List of Geneaolgy Sites on the Internet: Pennsylvania
Derry Area Historical Society
Directory of the Borough of Chester, for the Years 1859-60
Earthquake History of Pennsylvania
Free Library of Philadelphia Centennial Exhibition
A Friendly Guide to Philadelphia and the Wanamaker Store (1926)
GeneaSearch: Pennsylvania
Google: Pennsylvania - History
Greene County Historical Society Museum
Historical Markers
Historical Museum Guide for Pennsylvania
Historical Society of Pennsylvania
Historical Society of Pennsylvania Online Catalog
History of Delaware County, Pennsylvania (1884)
History of Northumberland County, Pennsylvania (1891)
A History of Philadelphia's University City (1963)
Kindred Trails: Pennsylvania
An Illustrated History of the Commonwealth of Pennsylvania (1876)
Mifflin County Historical Society
National Historic Landmarks & National Register of Historic Places in Pennsylvania
PA's Past: Digital Bookshelf at Penn State
Pennsylvania Biography (1831)
Pennsylvania Cemeteries
Pennsylvania Census Records
Pennsylvania City Directories
Pennsylvania Ghost Towns
Pennsylvania Historical and Museum Commission
Pennsylvania Historical Societies
Pennsylvania History Online
Pennsylvania Museums Guide
Pennsylvania Obituary Links
Pennsylvania State Archives
Pennsylvania Tornadoes 1950-1995
Perry-Castaņeda Library Map Collection: Pennsylvania
Philadelphia and Its Environs (1873)
Pictorial Sketch-book of Pennsylvania (1852)
Pittsburgh; Its Industry & Commerce (187o)
Political Graveyard: Pennsylvania
Repositories of Primary Sources: Pennsylvania
ROOTS-L Pennsylvania
Senator John Heinz Pittsburgh Regional History Center
Skippack Historical Society
State Museum of Pennsylvania
Tribes and Villages of Pennsylvania
Yahoo!: Pennsylvania - History
York County Marriage Records 1885-1921
York County Naturalization Records 1779-1990