Columbia subject headings:
Harvard subject headings:
Germany. Kriegsmarine--History.
Germany. Kriegsmarine--Officers--History.
Great Britain. Royal Navy--History.
Great Britain. Royal Navy--Officers--History.
World War, 1914-1918--Naval operations, British
World War, 1914-1918--Naval operations, German
Princeton subject headings:
Germany. Kriegsmarine--Officers--History--19th century.
Germany. Kriegsmarine--Officers--History--20th century.
Great Britain. Royal Navy--Officers--History--19th century.
Great Britain. Royal Navy--Officers--History--20th century.