Haku
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Strontium 90 and Caesium 137 in cow's fodder and milk in Finland 1961-1962
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1964)
The effects of soil factors on the uptake of radiostrontium by plants. Part 1
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1968)