[55] Canadian Crime Statistics, (Statistics Canada, Canadian Centre for Justice Statistics, Annual); Uniform Crime Reports for the United States, (United States Department of Justice, Federal Bureau of Investigation, Annual); and Brandon S. Centerwall, "Homicide and the Prevalence of Handguns: Canada and the United States, 1976 to 1980", American Journal of Epidemiology, (Vol. 134 No. 11, Dec. 1991), pp. 1245-1264.