Columbia subject headings:
Harvard subject headings:
Economic geography--Congresses.
Information services industry--Congresses.
Information technology--Congresses
Regional economics--Congresses.
Space in economics--Congresses
Princeton subject headings:
Economic geography--Congresses.
Information networks--Congresses.
Information services industry--Congresses.
Information technology--Congresses.
Regional economics--Congresses.
Space in economics--Congresses.