Pennsylvania Atlas of Historical County Boundaries
John H. Long, Editor; Peggy Tuck Sinko, Associate Editor; Gordon DenBoer, Historical Compiler; Douglas Knox, Book Digitizing Director; Emily Kelley, Research Associate; Laura Rico-Beck, GIS Specialist and Digital Compiler; Peter Siczewicz, ArcIMS Interactive Map Designer; Robert Will, Cartographic Assistant
Copyright The Newberry Library 2008
DEALE (Del.), see SUSSEX (Del.)
DURHAM (Md., extinct)
KENT (Del.)
LITCHFIELD (Conn.)
MONONGALIA (W.Va.)
NEW CASTLE (Del.)
OHIO (W.Va.)
ONTARIO (see BRADFORD)
Pennsylvania (non-county area)
ST. JONES (Del.), see KENT (Del.)
SUSSEX (Del.)
UPLAND (Del., extinct)
West Augusta District (Va.)
WESTMORELAND (Conn.)
WORCESTER (Md., original, extinct)
YOHOGANIA (Va., extinct)