Guide to the study of insects and a treatise on those injurious and beneficial to crops : for the use of colleges, farm-schools, and agriculturists / by A.S. Packard.

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Guide to the study of insects and a treatise on those injurious and beneficial to crops : for the use of colleges, farm-schools, and agriculturists / by A.S. Packard. Public Domain Mark. Source: Wellcome Collection.