1. Perez, D. D. and Gerrol, D. M. The Observer, 24 January 1969.
2. National Academy of Sciences, The effects of herbicides in South Vietnam. Part A, summary and conclusions, Washington, D.C. 1974, p. S-3.
3. National Academy of Sciences, The effects of herbicides in South Vietnam. Part A, summary and conclusions, Washington, D.C. 1974, p. S-6.
4. Westing, A. Ecological consequences of the second Indo-China War, Stockholm International Peace Research Institute (1976), p. 28.
5. Background report on herbicide operations in South Vietnam, Department of Defense (April 1971).