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Subject
- Advertising, Industrial389
- Chemical industry389
- Corporations389
- Hercules Incorporated389
- Naval stores315
- Insecticides171
- Toxaphene101
- Research, Industrial86
- Insect pests73
- Pine oil62
- Insect pests--Control55
- Explosives industry35
- Thanite35
- Disinfection and disinfectants29
- Explosives29
- Gums and resins29
- Disinfectants industry24
- Metal castings23
- Terpenes23
- DDT (Insecticide)21