Langer Susanne K <br/><br/>
Introduction to symbolic logic. 

 - New York     Dover Publications       1967 
 - 367p.  cm. 
<br/><br/><label>Standard No.: </label>44339 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>R14, K7