Columbia subject headings:
Peter II, Prince-Bishop of Montenegro, 1813-1851--Philosophy.
Peter II, Prince-Bishop of Montenegro, 1813-1851--Religion.
Harvard subject headings:
Peter II, Prince-Bishop of Montenegro, 1813-1851--Philosophy.
Peter II, Prince-Bishop of Montenegro, 1813-1851--Religion.
Princeton subject headings:
Peter II, Prince-Bishop of Montenegro, 1813-1851--Philosophy.
Peter II, Prince-Bishop of Montenegro, 1813-1851--Religion and ethics.