Columbia subject headings:
Freud, Sigmund, 1856-1939--Religion.
Marx, Karl, 1818-1883--Religion.
Nietzsche, Friedrich Wilhelm, 1844-1900--Religion.
Religion--Controversial literature--History and criticism.
Harvard subject headings:
Freud, Sigmund, 1856-1939--Religion.
Marx, Karl, 1818-1883--Religion.
Nietzsche, Friedrich Wilhelm, 1844-1900--Religion.
Religion--Controversial literature--History and criticism.
Princeton subject headings:
Freud, Sigmund, 1856-1939.
Marx, Karl, 1818-1883.
Nietzsche, Friedrich Wilhelm, 1844-1900.
Religion--Controversial literature--History and criticism.