[1] Letter from Wu Wen Tsao to the Redfields, March 21, 1949. UC.
[2]以下三段见Letter from Herbert Passin to Robert Redfield, May 3, 1950. UC.
[3] Excerpt from Letter to Hugh Borton from RFE, June 30, 1949. RAC.
[4] Letter from Herbert Passin to Robert Redfield, May 3, 1950. UC.
[5] Grant in Aid to Yale University, Account #RF50160, approved on Feb.7, 1951. RAC.
[6] Letter from Wu Wen Tsao to Roger F Evans, August 17, 1950. RAC.
[7] Letter from Redfield to Evans, Sept 14, 1950. RAC.
[8] Letter from Wu Wen Tsao to Evans, September 12, 1950. RAC.
[9] Letter from Wu Wen Tsao to David H Rowe, Yale University, July 31, 1951; Letter from Wu to Evans, July 31, 1951. RAC.
[10] Letter from John Fairbank to Professor David N. Rowe (c/o Dr. Mary Wright,The Hoover Library, Standford University),November 23, 1951. UC; Excerpt from letter to RFE from A. Doak Barnett, May 14, 1952. RAC.