Hopper, R. <br/><br/>
Children's speech:  a practical introduction to communication development/ 
Robert Hopper, and Rita C Naremore 
 - New York:  Harper& Row,  1973. 
 - x,140p.:  ill.;  21 cm 
<br/><br/> includes bibliographical references and index 
<br/><br/><label>ISBN: </label>060447222 
<br/><br/><label>LC Class. No.: </label>DUCE P136.H6