Columbia subject headings:
Europe--Commerce--Pacific Area--History.
Pacific Area--Commerce--Europe--History.
Pacific Area--Commerce--Spain--History.
Pacific Area--Economic conditions.
Spain--Commerce--Pacific Area--History.
Harvard subject headings:
Europe--Commerce--Pacific Area--History.
Pacific Area--Commerce--Europe--History.
Pacific Area--Commerce--Spain--History.
Pacific Area--Economic development--History.
Spain--Commerce--Pacific Area--History.
Princeton subject headings:
Europe--Commerce--Pacific Area--History.
Pacific Area--Commerce--Europe--History.
Pacific Area--Commerce--Spain--History.
Spain--Commerce--Pacific Area--History.