Columbia subject headings:
Harvard subject headings:
Business enterprises--Law and legislation--Spain--Castilla y León--History.
Business enterprises--Spain--Castilla y León--History.
Commercial law--Spain--Castilla y León--History.
Princeton subject headings:
Castile (Spain)--Commerce--History.
Commercial law--Castile (Spain)--History.
Guilds--Spain--Castile--History.