Columbia subject headings:
Ethics, Comparative.
Ethics.
Hegel, Georg Ludwig Friedrich, 1807-1831.
Kant, Immanuel, 1724-1804.
Solovyov, Vladimir Sergeyevich, 1853-1900.
Harvard subject headings:
Ethics, Comparative.
Hegel, Georg Ludwig Friedrich, 1807-1831--Contributions in ethics.
Kant, Immanuel, 1724-1804--Contributions in ethics.
Solovyov, Vladimir Sergeyevich, 1853-1900--Contributions in ethics.
Princeton subject headings: