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)
Soil factors affecting the calcium strontium ratio in plants
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1969)
The effect of magnesium, potassium and nitrogen fertilizers on the contents and ratios of nutrients in spring cereals and grassland crops
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1979)