Get This : Simplified signs. Volume 2, Simplified sign lexicon, descriptions, and memory aids : a manual sign-communication system for special populations / John D. Bonvillian [and three others] ; illustrated by Val Nelson-Metlay.

Title : Simplified signs. Volume 2, Simplified sign lexicon, descriptions, and memory aids : a manual sign-communication system for special populations / John D. Bonvillian [and three others] ; illustrated by Val Nelson-Metlay.

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