Fenson, Larry  c1991. <br/><br/>
Human Development 91/92/ 
Larry Fenson and Judith Fenson. 
 - 9th ed. 
 - Virginia:  The Dushkin Pub. Group,  c1991. 
 - iv,239p.:  22cm. 
<br/><br/> Includes index and bibliographical references. 
<br/><br/><label>ISBN: </label>1561340235 
<br/><br/><label>LC Class. No.: </label>HQ 768  / .F 46 1991.