Columbia subject headings:
Harvard subject headings:
Industrial clusters--Research--Germany--Congresses.
Regional economics--Research--Germany--Congresses.
Research--Germany--Congresses.
Technological innovations--Research--Germany--Congresses.
Princeton subject headings:
Industrial clusters--Research--Germany--Congresses.
Regional economics--Research--Germany--Congresses.
Research--Germany--Congresses.
Technological innovations--Research--Germany--Congresses.