Columbia subject headings:
Fontane, Theodor, 1819-1898. Poggenpuhls.
Kant, Immanuel, 1724-1804.
Philosophy.
Solzhenit︠s︡yn, Aleksandr Isaevich, 1918-2008--Political and social views.
Harvard subject headings:
Philosophy, Modern.
Wolandt, Gerd.
Princeton subject headings: