Columbia subject headings:
Harvard subject headings:
Salvage--France--Basse-Normandie.
Shipwrecks--France--Basse-Normandie.
World War, 1939-1945--France--Basse-Normandie--Equipment and supplies.
Princeton subject headings:
Salvage--France--Basse-Normandie--History--20th century.
Shipwrecks--France--Basse-Normandie--History--20th century.
World War, 1939-1945--Equipment and supplies.
World War, 1939-1945--Naval operations, American.
World War, 1939-1945--Naval operations, British.