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