What is a logical system? 
edited by D. M. Gabbay 
 - Oxford  Oxford University Press  1994 
 - 454 p. : ill. ; 24 cm. 
 - Studies in logic and computation .
<br/><br/><label>ISBN: </label>0198538596  RM199.48 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic, Symbolic and mathematical<br/>Computer science