Silverman, F H <br/><br/>
The speechless population: how large is it?  [electronic resource] 

 -  Perceptual and motor skills  Dec 1980 
 - 1178 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0031-5125 
<br/><br/><label>Standard No.: </label>10.2466/pms.1980.51.3f.1178  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adult<br/>Child<br/>Communication Devices for People with Disabilities<br/>Humans<br/>Self-Help Devices<br/>Speech Disorders--rehabilitation