Block, Berthold. Abdominal ultrasound : step by step / Berthold Block. - 2nd ed. - Stuttgart : Thieme, 2012. - 292 p. : ill. ; 27 cm. ISBN: 9783131383624 RM230.81 Subjects--Topical Terms: Ultrasonic imaging--Technique.Ultrasonography.Abdomen--Ultrasonic imaging.