Columbia subject headings:
Ethics, Modern--20th century.
Moore, G. E. (George Edward), 1873-1958--Ethics.
Harvard subject headings:
Ethics, Modern--20th century.
Moore, G. E. (George Edward), 1873-1958--Ethics.
Princeton subject headings:
Ethics, Modern--20th century.
Moore, G. E. (George Edward), 1873-1958--Ethics.