Johnstone, P.T., et al <br/><br/>
Indexed categories & their applications 
P.T. Johnstone, et al 
 - Berlin  Springer  1978 
 - vii  260 
 - Lecture notes in mathematics 661 .
<br/><br/><label>ISBN: </label>3540089144 
<br/><br/><label>Dewey Class. No.: </label>1.04+22  / JOHN