Blindenorientierungshilfe mit Ultraschallsonarsy und akustischer Anzeige

Author: Wallerus H.  

Publisher: S. Hirzel Verlag

ISSN: 1610-1928

Source: Acta Acustica united with Acustica, Vol.46, Iss.2, 1980-10, pp. : 193-200

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Abstract