Delaware County History
Chester Historic Preservation Committee
Darby Borough Historical and Preservation Soceity
Delaware County Archives
Delaware County Heritage Commission
Delaware County HIstorical Society
Delaware County Institute of Science
Delaware County Library System
Haverford Township Historical Society
Old Chester PA
Springfield Historical Society
Friends of Sellers Hall
Thomas Massey House
Marcus Hook Preservation Society
Chester County Historical Society
Lancaster County Historical Society
Montgomery County Historical Society
Historical Society of Pennsylvania
Pennsylvania Historical and Museum Commission
Pennsylvania Vital Records Information
Guide to Pennsylvania Historical Resources