?url_ver=Z39.88-2004&rft_id=10.1109%2FITSIM.2008.4631900&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aulast=Aziz&rft.au=Aziz%2C+I.A.&rft.aufirst=I.A.&rft.isbn=9781424423286&rft.date=2008&rft.title=Blind+echolocation+using+ultrasonic+sensors&rft.genre=proceeding