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Quassiin as a contact insecticide
The horseflies of the subfamily Tabaninae of the Nearctic region
Decays and discolorations in airplane woods
Cooperative grain marketing : a comparative study of methods in the United States and in Canada
The recovery of potash from alunite
Digestibility of some vegetable fats
Investigations of heat canker of flax
Cereal experiments in Maryland and Virginia
Insect powder
Machinery cost of farm operations in western New York