Johnson, David W  & Johnson, Frank P <br/><br/>
Joining together: group theory & group skills 

 - Prentice-Hall, Inc., New Jersey  1987 
 - xvi, 493 
<br/><br/><label>ISBN: </label>0-13-510488-2 
<br/><br/><label>Dewey Class. No.: </label>301.151 Joh/Joh