Columbia subject headings:
Immigrants--Spain--Madrid--Social conditions.
Madrid (Spain)--Emigration and immigration.
Social integration--Spain--Madrid.
Harvard subject headings:
Immigrants--Spain--Madrid--Social conditions.
Immigrants--Spain--Madrid.
Madrid (Spain)--Emigration and immigration.
Social integration--Spain--Madrid.
Princeton subject headings:
Immigrants--Spain--Madrid.
Madrid (Spain)--Emigration and immigration.
Social integration--Spain--Madrid.