DescriptionA 4 Gamma/Beta proportional counting system for the absolute calibration of radioisotopes set up in the laboratory at the International Atomic Energy Agency headquarters in Vienna. Left, Professor Alexandre Sanielevici, right, Miss Maria Chino, background,. Mr. Andre Gandy, of the Division of Research and Laboratories, IAEA. IAEA/2 February 1960/No. 552. Please credit IAEA
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