"Comparison of crashes involving ambulances with those of similar-sized vehicles" | International Committee of the Red Cross |
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US Navy Military Sealift Command | 1949, "The Origin of Medical Terms" |
Oxford English Dictionary ambulance definition 1• World War One Document Archive | Ray AF, Kupas DF October—December 2005 |
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Canadian Association of Emergency Physician | Oxford English Dictionary ambulance definition 2a• |