Columbia subject headings:
Harvard subject headings:
Germany--History, Naval--20th century.
Germany. Kriegsmarine--Officers--Biography.
Motorboats--Germany--History--20th century.
Petersen, Rudolf, 1905-1983.
Ship captains--Germany--Biography.
World War, 1939-1945--Germany--Naval operations, German.
Princeton subject headings:
Germany--History, Naval--20th century.
Germany. Kriegsmarine--Officers--Biography.
Motorboats--Germany--History--20th century.
Petersen, Rudolf, 1905-1983.
Ship captains--Germany--Biography.
World War, 1939-1945--Germany--Naval operations, German.