Columbia subject headings:
Harvard subject headings:
Germany. Kriegsmarine--Biography.
Merchant marine--Germany--Biography.
Sailors--Germany--Biography
Schulz, Wilhelm, 1906-
Schulz, Wilhelm, 1906-1986.
Submarine captains--Germany--Biography.
World War, 1939-1945--Naval operations, German.
World War, 1939-1945--Naval operations--Submarine.
World War, 1939-1945--Personal narratives, German.
Princeton subject headings:
Germany. Kriegsmarine--Biography.
Merchant marine--Germany--Biography.
Sailors--Germany--Biography.
Schulz, Wilhelm, 1906-1986.
World War, 1939-1945--Naval operations, German.
World War, 1939-1945--Naval operations--Submarine.
World War, 1939-1945--Personal narratives, German.