by J. E. Howitt
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The more important fruit tree diseases o...
The more important fungus and bacterial ...
The perennial sow thistle and some other...
Weeds of Ontario
The smuts and rusts of grain crops
Wholesale price list
Federal-grant research at the state agri...
Herbivorous fishes
Identification and Control of Common Wee...
Noxious range weeds
Biological control of tropical weeds usi...