Columbia subject headings:
Harvard subject headings:
Adventure and adventurers--Europe.
Europe--Biography.
Explorers--Europe.
Travelers' writings, European--History and criticism.
Travelers--Europe
Voyages and travels--Early works to 1800
Princeton subject headings:
Adventure and adventurers--History.
Discoveries in geography--History.
Explorers--Europe--Biography.
Voyages and travels--History.