Columbia subject headings:
America--Commerce--History.
Atlantic Ocean--History.
Civilization, Modern.
Europe--Commerce--History.
History, Modern.
Harvard subject headings:
Atlantic Ocean Region--Commerce--Europe--History.
Atlantic Ocean Region--Discovery and exploration--European.
Civilization, Modern
Europe--Commerce--Atlantic Ocean Region--History.
Europe--Commerce--North Atlantic Region--History.
History, Modern
North America--Discovery and exploration--European.
North Atlantic Region--Commerce--Europe--History.
North Atlantic Region--Discovery and exploration--European.
Princeton subject headings:
America--Commerce--History.
Atlantic Ocean--History.
Civilization, Modern.
Europe--Commerce--History.
History, Modern.