Columbia subject headings:
Schmitt, Carl, 1888-1985--Political and social views.
Voegelin, Eric, 1901-1985--Political and social views.
Harvard subject headings:
Schmitt, Carl, 1888-1985--Political and social views.
Voegelin, Eric, 1901-1985--Political and social views.
Princeton subject headings:
Schmitt, Carl, 1888-1985--Political and social views.
Voegelin, Eric, 1901-1985--Political and social views.