Bullmastiff Breed Standard - Official description of the breed as provided by the American Kennel Club (AKC). - http://www.akc.org/breeds/bullmastiff/
Bullmastiffs Online - Breed history, care and training tips, message board, health articles, diet recommendations, and a list of breeders. - http://www.bullmastiffsonline.com/
Bullmastiff Information on the Internet - Links to breeders, breed web sites, rescue, discussion lists, questions to ask a breeder, and hip dysplasia. - http://www.bullmastiff.org/
What the Prudent Buyer Should Know - Questions to ask breeders, how to adopt a Bullmastiff, owner responsibilities, message board, and a referral list. - http://www.bullmastiffinfo.org/