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1.
Introduction to sign teaching and the use of communication aids/ Stephen von Tetzchner and Harald Martinsen; translated by Kevin M. J. Quirk by
Material type: Text Text; Format: print ; Literary form: Not fiction ; Audience: Adult;
Language: English
Publication details: London : Whurr pub., 1992
Availability: Items available for loan: National Library of India (1)Call number: E 419 T 294.

2.
Augmentative and alternative communication for children, adolescents and adults with developmental disorders / Stephen von Tetzchner, Harald Martinsen and Kristine Stadskleiv. by
Material type: Text Text; Literary form: Not fiction
Publication details: Abingdon, Oxon ; New York, NY : Routledge, 2024
Online resources:
Availability: Items available for loan: National Library of India (1)Call number: 362.4/048.

                                                                           
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