Columbia subject headings:
Harvard subject headings:
Philosophy, Modern--History.
Religion--Controversial literature--History and criticism.
Underground literature--Europe--History and criticism.
Princeton subject headings:
Philosophy and religion--History--17th century.
Philosophy and religion--History--18th century.
Philosophy, Modern--17th century.
Philosophy, Modern--18th century.
Religion--Controversial literature--History and criticism.
Underground literature--Europe--History and criticism.