Blackett, Donald W. <br/><br/>
Elementary topology :  a combinatorial and algebraic approach / 
Donald W. Blackett 
 - Repr. with corrections 
 - London :  Academic Press,  1982 
 - ix, 224p. :  ill.  23 cm. 
<br/><br/>Bibliography: p 219. - Includes index 
<br/><br/><label>ISBN: </label>0121030601 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Algebraic topology