[Telecobaltotherapy of breast cancer. (A study on telecobaltotherapy. 21].
D001940:Breast; D001943:Breast Neoplasms / Q000532:radiotherapy*; D003035:Cobalt; D003037:Cobalt Radioisotopes; D006801:Humans
D003037:Cobalt Radioisotopes; D003035:Cobalt
BREAST NEOPLASMS/radiotherapy; COBALT/radioactive