topology of fibre bundles  
Steenrod, Norman Earl, 
 - 1st paperback printing. 
 - Princeton, NJ :  Princeton University Press,  1999 
 - viii, 229 p. :  ill. ;  24 cm. 
<br/><br/> Originally published: Princeton : Princeton University Press, 1951. 
<br/><br/><label>ISBN: </label>0691005486 (pbk. : alk. paper)