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Outline of plan of operations for cooperative protection of crops against grasshoppers during 1939 : (contingent on the availability of necessary federal funds)

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By: United States. Bureau of Entomology and Plant Quarantine. - Hoyt, Avery S., - Wallace, Henry A. (Henry Agard), - United States. Department of Agriculture.

Publication info: Washington, D.C, Bureau of Entomology and Plant Quarantine, December 15, 1938

Holding Institution: U.S. Department of Agriculture, National Agricultural Library