?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Wetzel%2C+Richard&rft.aulast=Wetzel&rft.aufirst=Richard&rft.date=2014&rft.title=Introducing+Pattern+Cards+for+Mixed+Reality+Game+Design&rft.genre=proceeding