TIPSTER Program History Thomas H Crystal author 1993-09 text TIPSTER TEXT PROGRAM: PHASE I: Proceedings of a Workshop held at Fredricksburg, Virginia, September 19-23, 1993 Association for Computational Linguistics Fredericksburg, Virginia, USA conference publication crystal-1993-tipster 10.3115/1119149.1119152 https://aclanthology.org/X93-1002/ 1993-09 3 4