RT Book, Section SR Electronic(1) A1 Lierz, Michael YR 2019 T1 Endoscopy, biopsy and endosurgery T2 BSAVA Manual of Backyard Poultry Medicine and Surgery PB British Small Animal Veterinary Association DO 10.22233/9781910443194.12 UL https://www.bsavalibrary.com/content/chapter/10.22233/9781910443194.chap12