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Simplified signs. Volume 1, Principles, background, and application : a manual sign-communication system for special populations / John D. Bonvillian [and three others] ; illustrated by Val Nelson-Metlay.

by Bonvillian, John D [author.] | Nelson-Metlay, Val [illustrator.].

Material type: Text Text; Format: available online remote; Literary form: Not fiction Publisher: Cambridge, England : Open Book Publishers, [2020]Copyright date: �2020Online access: Wie greife ich auf das E-Book zu? | Click to View Availability: No items available.

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.

by Bonvillian, John D [author.] | Nelson-Metlay, Val [illustrator.].

Material type: Text Text; Format: available online remote; Literary form: Not fiction Publisher: Cambridge, England : OpenBook Publishers, [2020]Copyright date: �2020Online access: Wie greife ich auf das E-Book zu? | Click to View Availability: No items available.

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