Early history of diagnostic ultrasound: the role of American radiologists.
Goldberg
B B
BB
Department of Radiology, Thomas Jefferson University Hospital, Philadelphia, PA 19107.
Gramiak
R
R
Freimanis
A K
AK
D049673:History, 20th Century; D011871:Radiology / Q000266:history*; D014463:Ultrasonography / Q000266:history*; D014481:United States