Croom, Fred  H <br/><br/>
Principles of Topology / 
by Fred H. Croom  
 - New Delhi:  Cengage Learning,  2009 
 - p.312 
<br/><br/><label>ISBN: </label>9788131504659 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics<br/>Topology
<br/><br/><label>Dewey Class. No.: </label>514  / CRO-P