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- congresses (31)
- history (13)
- dictionaries (10)
- engineering design (10)
- biography (9)
- handbooks, manuals, etc (9)
- affaires (8)
- business (8)
- encyclopedies (8)
- gestion (8)
- industrial management (8)
- united states (8)
- bibliography (7)
- china (7)
- materials (7)
- periodicals (7)
- spectrum analysis (7)
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- literature, modern (6)
- american literature (5)
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