Johnson, David W. <br/><br/>
Cooperation in the classroom / 
David W. Johnson..et al. 
 - Edina :  International Book Co.,  1993. 
 - ca. 318 p. :  ill. ;  28 cm. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>0939603047 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational sociology.<br/>Classroom environment.<br/>Classroom management.