@inproceedings{collinsthompson-callan:2004:HLTNAACL,
  author    = {Collins-Thompson, Kevyn  and  Callan, James P},
  title     = {A Language Modeling Approach to Predicting Reading Difficulty},
  booktitle = {HLT-NAACL 2004: Main Proceedings },
  editor = {Susan Dumais, Daniel Marcu and Salim Roukos},
  year      = 2004,
  month     = {May 2 - May 7},
  address   = {Boston, Massachusetts, USA},
  publisher = {Association for Computational Linguistics},
  pages     = {193--200}
}