@techreport{CraswellHG01, author = {Nick Craswell and David Hawking and Kathleen Griffiths}, title = {Which search engine is best at finding airline site home pages?}, institution = {CSIRO Mathematical and Information Sciences}, year = {2001}, number = {01/45}, note = {\url{https://david-hawking.net/pubs/craswell_tr01.pdf}} }