Klopf,Donald . <br/><br/>
Interacting In Groups :  Theory And Practice /  eng. 
Donald W  Klopf . 
 - Second ed. 
 - Colorado :  Morton Publishing ; 
 - 277p.:  23cm. 
<br/><br/><label>ISBN: </label>0895821176 
<br/><br/><label>Dewey Class. No.: </label>302.34  / KLO