References
- ↑ "Chiefs of State and Cabinet members of foreign governments / National Foreign Assessment Center. 1966:Sept.-Dec." HathiTrust. Retrieved 19 April 2019.
- ↑ "Foreign Relations of the United States, 1964–1968, Volume XXVII, Mainland Southeast Asia; Regional Affairs - Office of the Historian".
- ↑ Short, Philip. (2013). Pol Pot: The History of a Nightmare. London: Hodder & Stoughton. p. 158. ISBN 978-1-4447-8030-7.
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