?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Noss%2C+Richard&rft.aufirst=Richard&rft.aulast=Noss&rft.pages=367-384&rft.issn=0013-1954&rft.atitle=Situating+graphs+as+workplace+knowledge&rft.title=Educational+Studies+in+Mathematics&rft.date=July+2007&rft.volume=90&rft.genre=article