Haku
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Mesopolobus graminum (Hårdh) (Hym., Pteromalidae), its population dynamics and influence on Javesella pellucida (F.)
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1970)
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)