Columbia subject headings:
347 avenue Louise (Brussels, Belgium)--Congresses.
Belgium--History--German occupation, 1940-1945--Congresses.
Germany. Geheime Staatspolizei.
Historic sites--Conservation and restoration--Belgium--Brussels--Congresses.
World War, 1939-1945--Graffiti--Congresses.
World War, 1939-1945--Prisoners and prisons, Belgian--Congresses.
World War, 1939-1945--Prisoners and prisons, German--Congresses.
Harvard subject headings:
347 avenue Louise (Brussels, Belgium)--Congresses.
Belgium--History--German occupation, 1940-1945--Congresses.
Germany. Geheime Staatspolizei
Germany. Geheime Staatspolizei--Congresses.
Graffiti--Belgium--Brussels--History--Congresses.
Historic sites--Conservation and restoration--Belgium--Brussels--Congresses.
World War, 1939-1945--Graffiti--Congresses.
World War, 1939-1945--Prisoners and prisons, Belgian--Congresses.
World War, 1939-1945--Prisoners and prisons, German--Congresses.
Princeton subject headings:
347 avenue Louise (Brussels, Belgium)--Congresses
Germany. Geheime Staatspolizei
Historic sites--Conservation and restoration--Belgium--Brussels--Congresses.
World War, 1939-1945--Graffiti--Congresses.
World War, 1939-1945--Prisoners and prisons, Belgian--Congresses.
World War, 1939-1945--Prisoners and prisons, German--Congresses.