Mathot, G.B <br/><br/>
A Handbook for teachers of multigrade classes, volume one :  Improving performance at the primary level / 
G.B. Mathot; Edited by June Cezair Wallace; Hope Mc Nish; John Allen. 
 - Paris :  UNESCO,  2001. 
 - 63 p. ;  il. 
<br/><br/><label>ISBN: </label>976639010X 
<br/><br/><label>No. de Clasificación Universal Decimal: </label>373.3 =20 "2001" MAT Vol.1.