Columbia subject headings:
Harvard subject headings:
Economic development--Germany--Rhein-Neckar-Kreis.
Metropolitan areas--Technological innovations--Europe.
Metropolitan areas--Technological innovations--Germany.
Rhein-Neckar-Kreis (Germany)--Economic conditions.
Princeton subject headings:
Economic development--Germany--Rhein-Neckar-Kreis.
Metropolitan areas--Technological innovations--Europe.
Metropolitan areas--Technological innovations--Germany.
Rhein-Neckar-Kreis (Germany)--Economic conditions.