Columbia subject headings:
Building stones--Spain--History.
Quarries and quarrying--Spain--History.
Stone industry and trade--Spain--History.
Harvard subject headings:
Building stones--Spain--History.
Quarries and quarrying--Spain--History.
Stone industry and trade--Spain--History.
Princeton subject headings:
Building stones--Spain--History.
Quarries and quarrying--Spain--History.
Stone industry and trade--Spain--History.