Improving Automatic Indexing through Concept Combination and Term Enrichment Christian Jacquemin author 1998-08 text 36th Annual Meeting of the Association for Computational Linguistics and 17th International Conference on Computational Linguistics, Volume 1 Association for Computational Linguistics Montreal, Quebec, Canada conference publication jacquemin-1998-improving-automatic 10.3115/980845.980944 https://aclanthology.org/P98-1097/ 1998-08 595 599