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2. AKC, 2010. American Kennel Club Breed List. .
3. Allen, L., 2007. Dog Parks: Benefits and Liabilities, Department of Earth and Environmental Science, University of Pennsylvania, Philadelphia.
4. APPA, 2011. National Pet Owners Survey 2010–2011. .
5. Aust, J., 2010. Creator/Founder of Bones 4 Dogs and Member of Dog Park Task Force, personal communication.