Gelfand, Sergei I. <br/><br/>
Methods of Homological Algebra 

 - Berlin  Springer  1996 
 - xviii,372p.  23cm. 
<br/><br/><label>ISBN: </label>3540547460 
<br/><br/><label>Dewey Class. No.: </label>512.55,  / D, GEL