Long, G. <br/><br/>
Graphs 

 - London :  Longman,  1969. 
 - 32p.;  21cm 
<br/><br/><label>ISBN: </label>582181941 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Primary Education
<br/><br/><label>Dewey Class. No.: </label>372.7  / LON