The Centers for Disease Control Studies on Fatal Dog Attacks
The CDC stopped tracking dog attacks by breed in 1998. They concluded that such tabulations are not a basis for public policy. 
NCRC-AVMA-CDC-statement
The American Veterinary Medical Assocation opposes breed specific legislation: ”Breed-specific approaches to dog bite prevention were found to be problematic in concept as well as in implementation, while many practical alternatives exist and hold promise for prevention of dog bites.”
Read the full AVMA statement: AVMA statement on CDC study
New Research Documents the Unreliability of Visual Identifications of Breed Dogs -
A comparison of visual and DNA identifications of breeds - Victoria Lea Voith, PhD, DVM, DACVB, Professor, Animal Behavior, Western University
Economic Analysis of the High Cost of Breed Bans: Best Friends Animal Society’s Fiscal Study and calculator-
NCRC: National Dog Bite Prevention Week -
2009 Press release: A Dog’s Eye View to Dog Bite Prevention
2008 Press Release: 
NCRC-Dog-bite-prevention-week-2008
NCRC Year End Reports Highlight Owner Responsibility
2008 Fatal Attacks: Year-end-report-2008
2007 Fatal Attacks: Year-end-report-20071
NCRC Reports: Resident Dog or Family Dog?
What is the difference between a resident dog and a family dog?
National Canine Research Council