Smith, Peter <br/><br/>
Introduction to formal logic / 
by Peter Smith 
 - Cambridge :  Cambridge University Press,  2003. 
<br/><br/><label>ISBN: </label>0521008042  £ 15.95 
<br/><br/><label>Subjects--Index Terms: </label>Logic 
<br/><br/><label>Dewey Class. No.: </label>160