The history of radiology in Philadelphia; the history of the Philadelphia Roentgen Ray Society.  II.  1920-1954.
D015143:Philadelphia; D011859:Radiography / Q000266:history*; D011871:Radiology; D012952:Societies; D013679:Technology, Radiologic / Q000266:history*; D014965:X-Rays
ROENTGENOLOGY/history