RADIATION FOR THERAPY--IN RETROSPECT AND PROSPECT.
D004583:Electrons; D006664:History; D049673:History, 20th Century; D006801:Humans; D008511:Medicine; D009369:Neoplasms / Q000532:radiotherapy*; D009686:Nuclear Physics; D010825:Physics; D011827:Radiation
ELECTRONS; HISTORY; HISTORY OF MEDICINE, 20TH CENT.; NEOPLASM RADIOTHERAPY; NUCLEAR PHYSICS; PHYSICS