Fossum Robert M <br/><br/>
Trivial extensions of a-belian categories 

 - New York       Springer-Verlag          1975 
 - x, 122p.  cm. 
 - Lecture Notes in Mathematics; 456 .
<br/><br/><label>Standard No.: </label>19920 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>B27, L54