Columbia subject headings:
Harvard subject headings:
Act (Philosophy)--History--18th century.
Ethics, Modern--18th century.
Kant, Immanuel, 1724-1804--Contributions in ethics.
Reason--History--18th century.
Princeton subject headings:
Act (Philosophy)--History--18th century.
Ethics, Modern--18th century.
Kant, Immanuel, 1724-1804.
Reason--History--18th century.