Gray, Brayton <br/><br/>
Homotopy theory :  an introduction to algebraic topology 

 - New York :  Academic Press,  1975 
 - xiii, 368 p. :  illus ;  23 cm. 
 - Pure and applied mathematics  64 .
<br/><br/><label>ISBN: </label>0122960505 
<br/><br/><label>LCCN: </label>74-5686 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Homotopy theory