Columbia subject headings:
Harvard subject headings:
Cultural landscapes--Germany--Weser River Valley--Congresses.
Lower Saxony (Germany)--History--Congresses.
Weser River Valley (Germany)--Economic conditions--Congresses.
Weser River Valley (Germany)--History--Congresses.
Weser River Valley (Germany)--Politics and government--Congresses.
Weser River Valley (Germany)--Social conditions--Congresses.
Princeton subject headings:
Cultural landscapes--Germany--Weser River Valley--Congresses.
Lower Saxony (Germany)--History--Congresses.
Weser River Valley (Germany)--Economic conditions--Congresses.
Weser River Valley (Germany)--History--Congresses.
Weser River Valley (Germany)--Politics and government--Congresses.
Weser River Valley (Germany)--Social conditions--Congresses.