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