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82. DDT (insecticide). Recommendations or suggestions on use of DDT for apple spraying in 1946; by State agencies, Entomological Branch, Canadian Department of Agriculture, and Bureau of Entomology and Plant Quarantine, Agricultural Research Administration, United States Department of Agriculture.

84. Cabbage aphid control in California; by Roy E. Campbell.

87. Pests. Use of aircraft in control of crop pests.