Columbia subject headings:
Harvard subject headings:
Africa, North--Emigration and immigration--History--20th century.
North Africans--Spain--History--20th century.
Spain--Emigration and immigration--History--20th century--Maps.
Spain--Emigration and immigration--History--20th century.
Princeton subject headings:
Africa, North--Emigration and immigration.
North Africans--Spain.
Spain--Emigration and immigration.