1935. Page 13. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration – Project 3F-2-302 and the Emergency Educational Program. Berkeley, CA

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1935. Page 13. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration - Project 3F-2-302 and the Emergency Educational Program. Berkeley, CA.

1935. Page 13. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration – Project 3F-2-302 and the Emergency Educational Program. Berkeley, CA.

Gallery for 1935. Page 13. BarkBeetle Enemies of California Forests. Prepared by the USDA Bureau of Entomology and Plant Quarantine in cooperation with the State Emergency Relief Administration – Project 3F-2-302 and the Emergency Educational Program. Berkeley, CA

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