Columbia subject headings:
Babbitt, Irving, 1865-1933.
Criticism--United States--History--20th century.
Humanism--History--20th century.
Harvard subject headings:
Babbitt, Irving, 1865-1933
Criticism--United States--History--20th century
Humanism--History--20th century.
Princeton subject headings:
Babbitt, Irving, 1865-1933.
Criticism--United States--History--20th century.
Humanism--History--20th century.