Columbia subject headings:
Civilization, Modern--19th century.
Civilization, Modern--20th century.
Space and time.
Technology and civilization.
Harvard subject headings:
Civilization, Modern--19th century
Civilization, Modern--20th century
Space and time.
Technology and civilization.
Princeton subject headings:
Civilization, Modern--19th century.
Civilization, Modern--20th century.
Space and time.
Technology and civilization.