Bonvillian, John D., <br/><br/>
Simplified signs.  a manual sign-communication system for special populations /  Volume 1,  Principles, background, and application : 
John D. Bonvillian [and three others] ; illustrated by Val Nelson-Metlay. 
 - 1 online resource (xxiv, 621 pages) :  illustrations 
<br/><br/><label>ISBN: </label>9781783749256 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sign language.
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Electronic books.
<br/><br/><label>LC Class. No.: </label>HV2474  / .B668 2020 
<br/><br/><label>Dewey Class. No.: </label>419