Haku
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Pests of cultivated plants in Finland during 1988
(Agricultural Research Centre, 1989)
Pests of cultivated plants in Finland in 1983
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1984)
Pests of cultivated plants in Finland in 1978
(Agricultural Research CentreMaatalouden tutkimuskeskus, 1979)