Jeffrey, Richard C. <br/><br/>
Formal logic  :its scope and limits 
/Richard C. Jeffrey.-- 
 - 3rd ed.- 
 - New York:  MacGraw-Hill,  [1991]. 
<br/><br/><label>ISBN: </label>0 07 032357 7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic
<br/><br/><label>LC Class. No.: </label>BC 128 JEF 1991