@inproceedings{CraswellHT99,
  author = {Nick Craswell and David Hawking and Paul Thistlewaite},
  title = {Merging Results from Isolated Search Engines},
  booktitle = {Proceedings of the 10th Australasian Database Conference},
  location = {Auckland, New Zealand},
  pages = {189-200},
  year = {1999},
  publisher = {Springer-Verlag},
  note = {\url{http://es.csiro.au/pubs/craswell_adc99.pdf}}
}