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- Barbiturates--Analysis1
- Beckman Instruments, inc.[remove]1
- Beckman, Arnold O.[remove]1
- Deluxe General Incorporated1
- Forensic sciences[remove]1
- Scientific apparatus and instruments1
- Spectrophotometer1
- Toxicology1
- Ultraviolet spectroscopy1
- United States. National Bureau of Standards1
- Vitamin A1
- Vitamins--Analysis1