Haku
Viitteet 1-2 / 2
The current status of plant protection and outlook for the near future
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1988)
Control of Rhopalosiphum padi (L.) (Hom., Aphididae) on cereals
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1976)