Rath, R.S. <br/><br/>
Elements of Symbolic Logic and Set Theory / 
by Rath R.S. 
 - Delhi:  Kalyani Publishers, 
 - p.122 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>510  / RAT-E