Ellen M. Voorhees Lori P. Buckland Proceedings of The Seventeenth Text REtrieval Conference, TREC 2008, Gaithersburg, Maryland, USA, November 18-21, 2008 National Institute of Standards and Technology (NIST) Special Publication 500-277 http://trec.nist.gov/pubs/trec17/t17_proceedings.html db/conf/trec/trec2008.html 2008