Potter, Ralph Kimball,  1894- <br/><br/>
Visible speech 
[by] Ralph K. Potter, George A. Kopp [and] Harriet Green Kopp. 
 - [Corr.] 
 - New York,  Dover Publications  [1966] 
 - xiv, 439 p.  illus.  25 cm. 
<br/><br/>Bibliography: p. 428. 
<br/><br/><label>LCCN: </label>65023130  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Deaf--Means of communication.<br/>Speech.<br/>Telephone--Equipment and supplies.
<br/><br/><label>LC Class. No.: </label>TK6500  / .P65 1966 
<br/><br/><label>Dewey Class. No.: </label>621.386 POT