Language and mental retardation :  empirical and conceptual considerations / 
edited by Richard L. Schiefelbusch, Ross H. Copeland and James O. Smith 
 - New York :  Holt, Rinehart and Winston,  c1967 
 - x, 208 p. :  ill. ;  23 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label> USD 5.95 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Children with mental disabilities--Language
<br/><br/><label>Dewey Class. No.: </label>132.2