- TREC. 1997.
- Ellen M. Voorhees, Donna K. Harman, editors, Proceedings of The Sixth Text REtrieval Conference, TREC 1997, Gaithersburg, Maryland, USA, November 19-21, 1997. Volume Special Publication 500-240 of National Institute of Standards and Technology (NIST), 1997.
- TREC. 1997.