. La mouche de hesse et la mouche à scie du blé de l'ouest, Manitoba, Saskatchewan et Alberta [microforme]. Mouche de Hesse; Mouches; Insectes nuisibles, Lutte contre les; Hessian flies; Flies; Insect pests. . Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Criddle, Norman, 1875-1933; Canada. Division de l'entomologie. Ottawa : Impr. du gouvernement

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsectp, bookyear1915