^ Jump up to: a b Owen, Taylor; Kiernan, Ben (October 2006). "Bombs Over Cambodia" (PDF). The Walrus. pp. 32–36. Archived (PDF) from the original on April 20, 2016. Retrieved January 29, 2012. Kiernan and Owen later revised their estimate of 2.7 million tons of U.S. bombs dropped on Cambodia down to the previously accepted figure of roughly 500,000 tons: See Kiernan, Ben; Owen, Taylor (April 26, 2015). "Making More Enemies than We Kill? Calculating U.S. Bomb Tonnages Dropped on Laos and Cambodia, and Weighing Their Implications". The Asia-Pacific Journal. Archived (PDF) from the original on September 12, 2015. Retrieved November 15, 2016.

^ Clymer, Kenton (2013). The United States and Cambodia, 1969–2000: A Troubled Relationship. Routledge. pp. 14–16. ISBN 978-1-134-34156-6.

^ Ambrose 1989, pp. 281–283.

^ Address to the Nation on Vietnam Archived March 4, 2016, at the Wayback Machine May 14, 1969

^ Jump up to: a b Time & 1971-04-05.

^ Mosyakov, Dmitry (2004). "The Khmer Rouge and the Vietnamese Communists: A History of Their Relations as Told in the Soviet Archives".  In Cook, Susan E. (ed.). Genocide in Cambodia and Rwanda. Yale Genocide Studies Program Monograph Series. p. 54ff. 