?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=Cathy&rft.aulast=Salika&rft.au=Salika%2C+Cathy&rft.title=Outer+Joins+by+Example&rft.date=May+2011&rft.genre=proceeding