The early history of roentgenology in Philadelphia; the history of the Philadelphia Roentgen Ray Society (1905-1920).  I.  1899-1920.
D015143:Philadelphia; D011859:Radiography / Q000266:history*; D012952:Societies; D013679:Technology, Radiologic / Q000266:history*; D014965:X-Rays
ROENTGENOLOGY/history