@inproceedings{efron:2009b,
  author    = {Miles Efron},
  title     = {Using Multiple Query Aspects to Build Test Collections without
               Human Relevance Judgments},
  booktitle = {ECIR '09: Proceedings of the 31th European Conference on IR Research on Advances in Information Retrieval},
  year      = {2009},
  publisher = {Springer-Verlag},
  pages     = {276-287},
}