Columbia subject headings:
World War, 1939-1945--Naval operations, German.
World War, 1939-1945--Naval operations--Submarine.
World War, 1939-1945--North Atlantic Ocean.
Harvard subject headings:
Princeton subject headings:
Cremer, Peter, 1911-1992.
Germany. Kriegsmarine--Biography.
Sailors--Germany--Biography.
World War, 1939-1945--Naval operations, German.
World War, 1939-1945--Naval operations--Submarine.
World War, 1939-1945--Personal narratives, German.