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The design of an ultrasonic echo reinforcement system for the blind

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1. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.258970

Identifer	oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:258970
Date	January 1980
Creators	Jones, John Robert
Publisher	University of Nottingham
Source Sets	Ethos UK
Detected Language	English
Type	Electronic Thesis or Dissertation