?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Tsaftaris&rft.au=Tsaftaris%2C+Sotirios+A.&rft.aufirst=Sotirios+A.&rft.inst=Northwestern+University&rft.title=DNA-Based+storage+and+retrieval+of+digital+signals&rft.date=2006&rft.degree=PhD+Thesis