Columbia subject headings:
Architecture, Domestic--Schleswig (Germany and Denmark)--History--Congresses.
Architecture--Schleswig (Germany and Denmark)--History--Congresses.
Courtyards--Schleswig (Germany and Denmark)--History--Congresses.
Farm buildings--Schleswig (Germany and Denmark)--History--Congresses.
Farmhouses--Schleswig (Germany and Denmark)--History--Congresses.
Harvard subject headings:
Architecture, Domestic--Schleswig (Germany and Denmark)--History--Congresses.
Architecture--Schleswig (Germany and Denmark)--History--Congresses.
Courtyards--Schleswig (Germany and Denmark)--History--Congresses.
Princeton subject headings:
Architecture, Domestic--Schleswig (Germany and Denmark)--History--Congresses.
Architecture--Schleswig (Germany and Denmark)--History--Congresses.
Courtyards--Schleswig (Germany and Denmark)--History--Congresses.