Johnson, David W.,  1940- <br/><br/>
Circles of learning :  cooperation in the classroom / 
David W. Johnson, Roger T. Johnson, Edythe Johnson Holubec. 
 - 4th ed. 
 - Edina, Minn. :  Interaction Book Co.,  c1993. 
 - 1 v. (various pagings) :  ill. ;  22 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0939603128 
<br/><br/><label>LCCN: </label>95220740 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Group work in education.<br/>Cooperativeness.
<br/><br/><label>LC Class. No.: </label>LB 1032  / .C537 1993