?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Voiklis%2C+John&rft.aulast=Voiklis&rft.aufirst=John&rft.date=11+September+2008&rft.title=A+Thing+Is+What+We+Say+It+Is%3A+Referential+Communication+and+Indirect+Category+Learning&rft.inst=Columbia+University