?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aulast=Calarco&rft.aufirst=Pascal+V.&rft.au=Calarco%2C+Pascal+V.&rft.title=Which+Barcode+Is+Real%3F+Solving+a+Post-Migration+Mystery+at+Scale&rft.date=27+April+2026&rft.genre=proceeding