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- Advertising2
- Advertising, Industrial2
- Atomic absorption spectroscopy1
- Atomizers1
- Beckman Instruments, Inc.2
- Birds1
- Chemical industry2
- Chemicals1
- Chemistry sets1
- Chemists1
- Colorimetry--Instruments1
- Corporations5
- DDT (Insecticide)2
- Dow Chemical Company1
- Drinking water1
- Drinking water--Microbiology1
- Drugs--Catalogs1
- Electrodes, Glass1
- Eli Lilly and Company1
- Employees2