Columbia subject headings:
Dictatorship--Europe--History--20th century.
Europe--Social conditions--20th century.
Housing--Europe--History--20th century.
Housing.
Harvard subject headings:
Housing policy--Spain--History--20th century.
Housing--Portugal--History--20th century.
Housing--Spain--History--20th century.
Spain--Social conditions--20th century
Princeton subject headings:
Dictatorship--Europe--History--20th century.
Europe--Social conditions--20th century.
Housing policy--Spain--History--20th century.
Housing--Europe--History--20th century.
Housing--Portugal--History--20th century.
Housing--Spain--History--20th century.
Housing.
Spain--Social conditions--20th century.