%0 Book Section %T Barium studies of the gastrointestinal tract – (a) oesophagus %B BSAVA Guide to Procedures in Small Animal Practice %D 2014 %I British Small Animal Veterinary Association %R doi:https://doi.org/10.22233/9781905319831.2.8 %U https://www.bsavalibrary.com/content/chapter/10.22233/9781905319831.ch2sec8