RT Book, Section SR Electronic(1) A1 Linney, Chris YR 2017 T1 Echo basics: what to measure, how and when to measure it T2 BSAVA Congress Proceedings 2017 PB British Small Animal Veterinary Association DO 10.22233/9781910443439.12.7 UL https://www.bsavalibrary.com/content/chapter/10.22233/9781910443439.ch12sec7