Jeffrey, Richard C <br/><br/>
Formal logic  its scope and limits 
Richard C. Jeffrey 
 - New York :  McGraw-Hill Book,  1967 
 - 238 p. :  ill. ;  23 cm. 
<br/><br/><label>ISBN: </label>007032316X 
<br/><br/><label>LCCN: </label>67-16929 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic