Khanna, M. L., <br/><br/>
Elementary  set  theory 

 - 19th /   2013. 
 - Meerut:  Jai  Prakash  Nath  &  Company,  2013. 
 - 304p. 
<br/><br/><label>Subjects--Personal Names: </label><br/>Mathematics, General  principles  of  mathematics. 
<br/><br/><label>Dewey Class. No.: </label>511.322