Gustason, William. <br/><br/>
Elementary symbolic logic / 
William Gustason [and] Dolph E. Ulrich. 
 - 2nd. edition 
 - viii, 280 p. 
<br/><br/> Includes bibliographical references. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>088133412X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic, Symbolic and mathematical.
<br/><br/><label>LC Class. No.: </label>BC135 GUS 1989