Johnson, David W.,  1940-. <br/><br/>
Learning together and alone :  cooperation, competition and individualization / 
/ David W.Johnson, Roger T. Johnson. 
 - Englewood Cliffs, N.J. :  Prentice-Hall,  1975. 
 - ix, 214 p. :  ill. ;  24 cm. 
<br/><br/>Bibliography: p. 204-214. 
<br/><br/><label>ISBN: </label>0135279526 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Group work in education.<br/>Individualized instruction.<br/>Interaction analysis in education.<br/>Lesson planning.