Fertility Models for Statistical Natural Language Understanding Stephen Della Pietra author Mark Epstein author Salim Roukos author Todd Ward author 1997-07 text 35th Annual Meeting of the Association for Computational Linguistics and 8th Conference of the European Chapter of the Association for Computational Linguistics Association for Computational Linguistics Madrid, Spain conference publication della-pietra-etal-1997-fertility 10.3115/976909.979639 https://aclanthology.org/P97-1022/ 1997-07 168 173