Columbia subject headings:
Harvard subject headings:
Cartography--History--20th century.
Cartography--History--21st century.
Cartography--Political aspects--20th century.
Cartography--Political aspects--21st century.
Princeton subject headings:
Cartography--History--20th century.
Cartography--History--21st century.
Cartography--Political aspects--20th century.
Cartography--Political aspects--21st century.