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2. The beginnings of urban ambulance service in the United States and England
3. 3. National Research Council: Accidental Death and Disability: the Neglected Disease of Modern Society, Washington, DC, National Academy of Sciences, National Research Council, 1966
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5. 5. Bowles LT, Sirica CM, eds, The Role of Emergency Medicine in the Future of American Medical Care, Proceedings of a Conference, New York, Josiah Macy, Jr. Foundation, 1995