Rat Terrier Club of America http://www.ratterrierclub.com
Canadian Kennel Club http://www.ckc.ca
American Kennel Club Rat Terriers http://www.akc.org/breeds/rat_terrier/
National Rat Terrier Association http://www.nrta.com
United Kennel Club Rat Terrier page http://www.ukcdogs.com/Website.nsf/Breeds/RatTerrier
Rat Terrier Wikipedia article http://www.en.wikipedia.org/wiki/Rat_Terrier
Dogster’s Rat Terrier page http://www.dogster.com/dog-breeds/Rat_Terrier