Columbia subject headings:
Architecture--Spain--History.
Building--Spain--History.
Industrial archaeology--Spain--History.
Urbanization--Spain--History.
Harvard subject headings:
Architecture--Spain--History.
Building--Spain--History.
Industrial archaeology--Spain--History.
Urbanization--Spain--History.
Princeton subject headings:
Architecture--Spain--History.
Building--Spain--History.
Industrial archaeology--Spain--History.
Urbanization--Spain--History.