title: Localisation using physical devices, radioisotopes and radiographic methods. I.--Demonstration of tissue interfaces within the body by ultrasonic echo sounding. 1961.
authors.forename: I
authors.initials: I
authors.lastname: Donald
authors.forename: T G
authors.initials: TG
authors.lastname: Brown
mesh_terms: D049673:History, 20th Century; D014463:Ultrasonography / Q000266:history*