Columbia subject headings:
Civilization, Modern.
Europe--History--1492-
Geographical perception--Europe--History.
Space perception--Europe--History.
Travel--Social aspects--Europe--History.
Harvard subject headings:
Civilization, Modern.
Europe--History--1492-
Geographical perception--Europe--History.
Space perception--Europe--History.
Travel--Social aspects--Europe--History.
Princeton subject headings:
Civilization, Modern.
Europe--History--1492-
Geographical perception--Europe--History.
Space perception--Europe--History.
Travel--Social aspects--Europe--History.