Columbia subject headings:
Germany--Politics and government--1933-1945.
Germany. Kriegsmarine--History--20th century.
National socialism--History.
Sea-power--Germany--History--20th century.
Harvard subject headings:
Germany--Politics and government--1933-1945.
Germany. Kriegsmarine--History--20th century.
National socialism--History.
Sea-power--Germany--History--20th century.
Princeton subject headings:
Germany. Kriegsmarine--History.
Sea-power--Germany--20th century.