Columbia subject headings:
Historic buildings--Pennsylvania.
History--Societies, etc.--Pennsylvania--Directories.
Pennsylvania Historical and Museum Commission.
Pennsylvania--History, Local.
Harvard subject headings:
Historic buildings--Pennsylvania
History--Societies, etc--Pennsylvania--Directories.
History--Societies, etc.--Directories.
Pennsylvania Historical and Museum Commission.
Pennsylvania--History, Local.
Princeton subject headings:
Directories.
History--Societies, etc.--Pennsylvania--Directories.
Pennsylvania Historical and Museum Commission.
Pennsylvania--Historic houses, etc.
Pennsylvania--History, Local.