Core concepts in mathematics :   set theory / 
Aleksandar Mratinkovic et al. 
 - New York;  3G E-Learning:  2019. 
 - 225p.  col, ill. 
<br/><br/>Concludes bibliographical reference and index. 
<br/><br/>
<br/><br/><label>ISBN: </label>9781984620576 
<br/><br/><label>Dewey Class. No.: </label>511.322   / T531 2019