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2. Dorland P, Nanney J. Dust off: army aeromedical evacuation in Vietnam. Washington, DC: Center of Military History United States Army; 1982. p. 6–7.
3. Haller JS. Battlefield medicine: a history of the military ambulance from the Napoleonic Wars through World War I. Carbondale: Southern Illinois University Press; 1992. p. 193–4.
4. Ibid., 197
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