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Published online by Cambridge University Press: 15 May 2009
The connexion between radioactive fall-out and the fission products was demonstarted by Blifford, Lockhart & Baus (1956), and the connexion between radioactive fall-out and radioactive strontium was reported by Libby also in 1956. Previous to the publication by Santholzer, Macků, Podrimek & Horak (1958) and Santholzer (1959) of records relating to the increased radioactive fall-out in areas in Central Europe (50° 10′ N. lat., 15° 50′ E. long.) which were not far distant from the area occupied by these University buildings, we had already decided to follow regularly the strontium 90 (90Sr) content of cow's milk produced in the area concerned.