Columbia subject headings:
Analogy.
Civilization, Modern--20th century.
Communication and traffic.
Communication.
McLuhan, Marshall, 1911-1980. Understanding media.
Technology and civilization.
Harvard subject headings:
Analogy
Civilization, Modern--20th century
Communication
Communication and traffic
McLuhan, Marshall, 1911-1980. Understanding media.
Technology and civilization
Princeton subject headings:
Analogy.
Civilization, Modern--20th century.
Communication and traffic.
Communication.
McLuhan, Marshall, 1911- Understanding media.
Technology and civilization.