Lipschutz, Seymour <br/><br/>
Theory and problems of set theory and related topics 

 - Mc Graw-Hill  New Delhi  1998 
<br/><br/><label>ISBN: </label>0-07-038159-3 
<br/><br/><label>LC Class. No.: </label>SBL QA 248   / L57 1998