Columbia subject headings:
Harvard subject headings:
Border crossing--Pyrenees--History--20th century.
Pyrenees--History--20th century.
World War, 1939-1945--Pyrenees.
World War, 1939-1945--Refugees--France.
World War, 1939-1945--Refugees--Spain.
World War, 1939-1945--Underground movements--Pyrenees.
Princeton subject headings:
Border crossing--Pyrenees--History--20th century.
Pyrenees--History--20th century.
World War, 1939-1945--Pyrenees.
World War, 1939-1945--Refugees--France.
World War, 1939-1945--Refugees--Spain.
World War, 1939-1945--Underground movements--Pyrenees.