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Subjects
- DDT1
- Dark Adaptation3
- Dentures -- statistics & numerical data1
- Dermatitis, Contact -- etiology1
- Desert Climate6
- Diagnosis1
- Diet9
- Diet Therapy1
- Disabled Persons -- rehabilitation6
- Disease Eradication -- organization & administration1
- Disease Transmission, Infectious -- prevention & control1
- Disinfectants -- adverse effects1
- Drinking Water3
- Dust -- prevention & control1