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Subjects
- Data Collection2
- Data Mining -- economics1
- Databases, Bibliographic3
- Databases, Bibliographic -- economics1
- Defense Data Network (U.S.)1
- Delivery of Health Care -- history1
- Dental Research -- history1
- Dentistry2
- Descartes, ReneĢ, 1596-1650.1
- Disasters1
- Disease -- psychology1
- District of Columbia2
- Documentation -- standards1