Columbia subject headings:
Spain--Emigration and immigration--Economic aspects.
Spain--Emigration and immigration--History--20th century.
Harvard subject headings:
Cultural pluralism--Spain.
Spain--Emigration and immigration--Economic aspects.
Spain--Emigration and immigration--Social aspects.
Princeton subject headings:
Cultural pluralism--Spain.
Spain--Emigration and immigration--Economic aspects.
Spain--Emigration and immigration--Social aspects.