Columbia subject headings:
Ethics--China--History--Congresses.
Ethics--Europe--History--Congresses.
Knowledge, Theory of--History--Congresses.
Metaphysics--History--Congresses.
Philosophy, Chinese--History--Congresses.
Philosophy, European--History--Congresses.
Harvard subject headings:
Ethics--China--History--Congresses.
Ethics--Congresses
Ethics--Europe--History--Congresses.
Knowledge, Theory of--Congresses
Knowledge, Theory of--History--Congresses.
Metaphysics--Congresses
Metaphysics--History--Congresses.
Philosophy, Chinese--Congresses.
Philosophy, Chinese--History--Congresses.
Philosophy, European--Congresses.
Philosophy, European--History--Congresses.
Princeton subject headings:
Ethics--China--History--Congresses.
Ethics--Europe--History--Congresses.
Knowledge, Theory of--History--Congresses.
Metaphysics--History--Congresses.
Philosophy, Chinese--History--Congresses.
Philosophy, European--History--Congresses.