?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Liu%2C+Weiling&rft.aulast=Liu&rft.aufirst=Weiling&rft.date=8+May+2009&rft.title=Understanding+Users+OPAC+Searching+Habits+through+Analysis+of+WebVoyage+Log+Files&rft.genre=proceeding