Bell,S.E <br/><br/>
Mathematics in the making  10 : Sets and relations 

 -  Longmans, 
 - 32p.;  20cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social Sciences
<br/><br/><label>Dewey Class. No.: </label>372.7  / BEL