10 Federalist Movement, Early to 1922 Box 2 Leslie H. Dingyan Chen's Collection of Historiographic Materials for a Biography of Chen Chiung-Ming, 1988
11 The Split with Sun Yat-sen -- The June 16 Incident, 1922 Box 2 Leslie H. Dingyan Chen's Collection of Historiographic Materials for a Biography of Chen Chiung-Ming, 1988
12 Federalist Movement - Another Chance, Aug 1922 - Jan 1923 Box 2 Leslie H. Dingyan Chen's Collection of Historiographic Materials for a Biography of Chen Chiung-Ming, 1988