Haku
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Resistance of plants to the pea aphid Acyrthosiphon pisum Harris (Hom., Aphididae) : I. Fecundity of the biotypes on different host plants
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1970)
Resistance of plants to the pea aphid, Acyrthosiphon pisum Harris (Hom., Aphididae) : 4. fecundity on different alsike and white clover varieties
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1971)
Effect of fertilizers on the reproduction of Tetranychus telarius (L.), Myzus persicae (Sulz.) and Acyrthosiphon pisum Harris
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1969)