Columbia subject headings:
New Jersey--Economic conditions.
New York Region--Economic conditions.
Office buildings--Economic aspects--New Jersey.
Office buildings--Economic aspects--New York (State)--New York Region.
Office buildings--Economic aspects--Pennsylvania--Philadelphia Region.
Philadelphia Region (Pa.)--Economic conditions.
Harvard subject headings:
Princeton subject headings:
New Jersey--Economic conditions.
New York Region--Economic conditions.
Office buildings--Economic aspects--New Jersey.
Office buildings--Economic aspects--New York Region.
Office buildings--Economic aspects--Pennsylvania--Philadelphia Region.
Philadelphia Region (Pa.)--Economic conditions.