1. Stoeckel RB: The problem of prevention of accidents caused by the use of motor vehicles . Johns Hopkins University. School of Hygiene and Public Health. De Lamar Lecturers 1925-1926 (Baltimore, Williams and Wilkins), 1927, p. 188. As quoted by Rosen G. Preventive Medicine in the United States 1900-1975: Trends and Interpretations, in Preventive Medicine USA. Prodist, New York , 1976, p 724.