Columbia subject headings:
Christianity--Controversial literature.
Humanism--History.
Philosophy, Modern--19th century.
Religion--Philosophy.
Ruge, Arnold, 1802-1880.
Harvard subject headings:
Christianity--Controversial literature
Humanism--History.
Philosophy, Modern--19th century.
Religion--Philosophy
Ruge, Arnold, 1802-1880.
Princeton subject headings:
Christianity--Controversial literature.
Humanism--History.
Philosophy, Modern--19th century.
Religion--Philosophy.
Ruge, Arnold, 1802-1880.