Group techniques in education / 
UNESCO. 
 - Paris :  [New York] :  Unesco ;  distributed by Unipub,  1977. 
 - 51 p. :  Ill. ;  27 cm. 
 - Educational studies and documents ; new ser., no. 24. .
<br/><br/>Bibliography: p. 51. 
<br/><br/><label>ISBN: </label>9231014110 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Group work in education.
<br/><br/><label>Dewey Class. No.: </label>371.25  / UNG 1977