Hilton, Peter. <br/><br/>
General Cohomology Theory and K-Theory /  

 - 1st ed /  
 - London W.1 :   Cambridge University Press ,   1980 
 - p.101 :  
<br/><br/><label>ISBN: </label>0-521-07976-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>B25  / L1;1