The Cabbage Root Maggot and Its Control in Canada [microform]: With Notes on the Imported Onion Maggot and the Seed-corn MaggotArthur GibsonÉpuiséPrévenez-moi
Boring Caterpillars Affecting Corn and Other Crops and Which Are Liable to Be Mistaken for the European Corn BorerArthur GibsonÉpuiséPrévenez-moi
