Comments on: “Blindenorientierungshilfen mit Ultraschallortungsverfahren und hörbarer Anzeige” by D. Anke
Author： Kay L.
Publisher： S. Hirzel Verlag
ISSN： 1610-1928
Source： Acta Acustica united with Acustica, Vol.34, Iss.3, 1976-01, pp. : 179-179
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