Columbia subject headings:
Chen, Duxiu, 1879-1942--Correspondence.
Communists--China--Correspondence.
Politicians--China--Correspondence.
Harvard subject headings:
Chen, Duxiu, 1879-1942--Correspondence.
Communists--China--Correspondence.
Politicians--China--Correspondence.
Princeton subject headings:
Chen, Duxiu, 1879-1942--Correspondence.
Communists--China--Correspondence.
Politicians--China--Correspondence.