TY - RPRT TI - The twelfth text REtrieval conference, TREC 2003 AU - Voorhes, Ellen M AU - Buckland, Lori P PY - 2004 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST SP 500-255 DO - 10.6028/NIST.SP.500-255 ER -