Columbia subject headings:
Migration, Internal--Spain.
Rural-urban migration--Spain.
Spain--Civilization--21st century.
Spain--Politics and government--21st century.
Spain--Rural conditions--21st century.
Urban-rural migration--Spain.
Harvard subject headings:
Migration, Internal--Spain.
Rural-urban migration--Spain.
Spain--Civilization--21st century.
Spain--Rural conditions--21st century.
Princeton subject headings:
Migration, Internal--Spain.
Rural-urban migration--Spain.
Spain--Civilization--21st century.
Spain--Rural conditions--21st century.