Steps in understanding mathematics :  teachers΄resource book. 

 - London:   Murray,   1989.  
 - 251 p. :  ill. ;  30 cm. 
<br/><br/><label>ISBN: </label>0719544572 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>510