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United States.: Bureau of Entomology and Plant Quarantine

Nicotine insecticides. Part V, Search for synergists
Nicotine insecticides. Part V, Search for synergists
United States.: Bureau of Entomology and Plant Quarantine
Colonization of the organism causing milky disease of Japanese beetle larvae
Colonization of the organism causing milky disease of Japanese beetle larvae
United States.: Bureau of Entomology and Plant Quarantine