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Subjects
- Weights and Measures[remove]10
- Chemical Phenomena1
- Child1
- Drug Prescriptions1
- England1
- Equipment and Supplies1
- Fever1
- Government Regulation1
- Lasers1
- Medical Device Legislation1
- Metric System1
- Nurses1
- Optical Devices1
- Schools1
- Telescopes1
- United States1
- United States. Food and Drug Administration1
- Vision Tests -- instrumentation1