Columbia subject headings:
Philosophy, Ancient--Periodicals.
Philosophy, Medieval--Periodicals.
Philosophy--History--Periodicals.
Harvard subject headings:
Philosophy, Ancient--Periodicals.
Philosophy, Medieval--Periodicals.
Philosophy--History--Periodicals
Princeton subject headings:
Periodicals.
Philosophy, Ancient--Periodicals.
Philosophy, Medieval--Periodicals.
Philosophy--History--Periodicals.