Columbia subject headings:
Harvard subject headings:
La Pernelle (France)--History, Military.
World War, 1939-1945--Campaigns--France--La Pernelle.
Princeton subject headings:
Atlantic Wall (France and Belgium)
Coast defenses.
Fortification--France--La Pernelle.
World War, 1939-1945--Campaigns--France--La Pernelle.