| Subject | |
|  | Dark Ages See: Middle Ages | 
|  | Dark humor (Literature) See: Black humor (Literature) | 
|  | Dark matter (Astronomy) | 
|  | Darkover (Imaginary place)--Fiction. | 
|  | Dartmouth College--Students. | 
| 6 | Darwin, Charles, 1809-1882. | 
|  | Darwin, Charles, 1809-1882--Encyclopedias. | 
| 2 | Darwin, Charles, 1809-1882. On the origin of species. | 
|  | Darwinism See: Evolution (Biology) | 
|  | Darwinism See: Natural selection | 
|  | Daschle, Thomas. | 
|  | Dasheen See: Taro | 
|  | Data analysis--Pohnpei, Micronesia (Federated States)--1997--College of Micronesia-FSM. | 
|  | Data analysis--Trust Territory of the Pacific Islands. | 
|  | Data base management. | 
| 4 | Data Collection. | 
|  | Data Collection--methods--United States. | 
|  | Data collection services See: Information services | 
|  | Data collection services See: Statistical services | 
|  | Data communication systems See: Data transmission systems | 
|  | Data curation. | 
|  | Data editing. | 
| 2 | Data editing--Methodology. | 
| 2 | Data encryption (Computer science). | 
|  | Data encryption (Computer science)--History. | 
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