Columbia subject headings:
Harvard subject headings:
Marine accidents--Baltic Sea--History.
Shipwrecks--Baltic Sea--History.
Wilhelm Gustloff (Ship)--History.
World War, 1939-1945--Baltic Sea--Naval operations.
Princeton subject headings:
Shipwrecks--Baltic Sea.
Wilhelm Gustloff (Ship)--History.
World War, 1939-1945--Baltic Sea--Naval operations.