Submitted on: 03 November 2000.
Revised on: 05 February 2001.
Accepted on: 18 February 2001.
___________________Augmentative and Alternative Communication
Submitted on: 29 May 2018.
Revised on: 27 August 2018.
Accepted on: 26 September 2018.
___________________Augmentative and Alternative Communication
Submitted on: 18 October 2008.
Revised on: 20 November 2008.
Accepted on: 27 December 2008.
___________________Augmentative and Alternative Communication
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Submitted on: 18 March 2016.
Revised on: 20 April 2016.
Accepted on: 31 May 2016.
___________________Augmentative and Alternative Communication