Haku
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The current status of plant protection and outlook for the near future
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1988)
Mesopolobus graminum (Hårdh) (Hym., Pteromalidae), its population dynamics and influence on Javesella pellucida (F.)
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1970)