Columbia subject headings:
Philosophy, Modern--19th century.
Philosophy, Modern--20th century.
Theology, Doctrinal--History--19th century.
Theology, Doctrinal--History--20th century.
Harvard subject headings:
Philosophy, Modern--19th century.
Philosophy, Modern--20th century.
Theology, Doctrinal--History--19th century.
Theology, Doctrinal--History--20th century.
Princeton subject headings:
Philosophy, Modern--19th century.
Philosophy, Modern--20th century.
Theology, Doctrinal--History--19th century.
Theology, Doctrinal--History--20th century.