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| 1991 | ||
|---|---|---|
| 2 | Cyril W. Cleverdon: The Significance of the Cranfield Tests on Index Languages. SIGIR 1991: 3-12 | |
| 1968 | ||
| 1 | Cyril W. Cleverdon: Introduction. Information Storage and Retrieval 4(2): 85 (1968) | |
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