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Subjects
- DDT1
- Dark Adaptation3
- Dentures1
- Dermatitis, Contact -- etiology1
- Desert Climate6
- Diet8
- Disabled Persons -- rehabilitation4
- Disease Eradication -- organization & administration1
- Disease Transmission, Infectious -- prevention & control1
- Disinfectants -- adverse effects1
- Drinking Behavior1
- Drinking Water3
- Dust -- prevention & control1