Viro, O. Ya. <br/><br/>
Elementary topology  : problem textbook / 

 - Providence:  American Mathematical Society,  2012 
 - xx, 400p. Bibl. Index 
<br/><br/><label>ISBN: </label>9780821887264 
<br/><br/><label>Dewey Class. No.: </label>514  / V819.ET