RT Book, Section SR Electronic(1) A1 Williams, John M. YR 2005 T1 Disorders of the perineum and anus T2 BSAVA Manual of Canine and Feline Gastroenterology PB British Small Animal Veterinary Association DO 10.22233/9781910443361.22 UL https://www.bsavalibrary.com/content/chapter/10.22233/9781910443361.chap22