The Joy of Signing

The Joy of Signing was a guidebook to sign language written by Lottie L. Riekehof in the late 20th century. 
This book was one of the texts studied by Data in his efforts to identify and learn the sign language by Riva. The text of this book was included in the Context Indices when Data was reviewing the file on the non-verbal language (gestural) M-9. ()
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Category:Earth literature