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Subject
- Advertising2
- Advertising, Industrial2
- Agricultural chemicals1
- Animals1
- Better homes and gardens books1
- Birds1
- Birds--Migration1
- Chemical industry2
- Corporations2
- DDT (Insecticide)7
- Dow Chemical Company1
- Hercules Incorporated1
- Home economics1
- Household pests1
- Insect pests4
- Insect pests--Control1
- Insecticides9
- Insecticides--Toxicology2
- Invertebrates1
- Periodicals1