Columbia subject headings:
Harvard subject headings:
Collective memory--Germany--Hamburg--History--20th century.
Emergency management--Germany--Hamburg--History--20th century.
Flood control--Germany--Hamburg--History--20th century.
Hamburg (Germany)--History--20th century.
Storm surges--Germany--Hamburg--History--20th century.
Princeton subject headings:
Collective memory--Germany--Hamburg--History--20th century.
Emergency management--Germany--Hamburg--History--20th century.
Flood control--Germany--Hamburg--History--20th century.
Hamburg (Germany)--History--20th century.
Storm surges--Germany--Hamburg--History--20th century.