ceey ee e 2 - Geneva Douglas udy Group Survivors “atomic bomb Source of Irradiation Primarily external Amount External Total Administered: Irradiation: Thyroid -—Internal Dose to Thyroid Dose ? Uncertain. 1 Hiroshima & yamma and an igasaki. first Dist. from hypocenter pan Study 1,400 2,000 VLIH-ABCC Life- collision neutron irradiation Effects (See Att. Sheet) ? Ave. Dose —— 1,000 meters 500 saa " " 100 44 € Lh gad’ i