Kelly, Albert Victor <br/><br/>
Mixed-ability grouping  theory and practice /  [Texte imprimé] : 
A. V. Kelly 
 - London:  Harper and Row Publishers,  1980 
 - XI-221 p. :  couv. ill. ;  21 cm 
<br/><br/>Bibliogr. p. 210-215 
<br/><br/><label>ISBN: </label>0-06-318070-7 
<br/><br/><label>Dewey Class. No.: </label>371.252