الوصفDr. K.C. TSIEN (left), a member of the International Atomic Energy Agency (IAEA)’s scientific staff, who has visited several Member States in connection with the use of large radiation sources for medical purposes, and Dr. Silverio, a Philippine radiotherapist, in front of a cobalt-60 teletherapy unit at the North General Hospital, Manila. IAEA/1961/No. 994B Please credit PHOTO PHILIPPINE AEC
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