Barr, M <br/><br/>
Tosposes, triples and theories   
by M. Barr and C. Wells 
 - New York  Springer verlag  1985 
 - xiii,345p 
 - Grundlehren der mathematischen Wissenschaften 278 .
<br/><br/> A series of comprehensive studies in mathematics 
<br/><br/><label>ISBN: </label>0387961151 
<br/><br/><label>Dewey Class. No.: </label>512.55  / N85