Columbia subject headings:
Harvard subject headings:
Germany--History, Naval--20th century.
Germany. Kriegsmarine--History--20th century--Exhibitions.
Warships--Germany--History--20th century--Exhibitions.
World War, 1914-1918--Germany--Naval operations--Exhibitions.
Princeton subject headings:
Diaries.
Germany--History, Naval--20th century.
Germany. Kriegsmarine--Biography.
Germany. Kriegsmarine--History.
Sailors--Germany--Diaries.
World War, 1914-1918--History.
World War, 1914-1918--Naval operations, German.