Langer, Susanne K <br/><br/>
Introduction to symbolic logic / 
by Susanne K Langer. 
 - 3rd ed. 
 - New York:  Dover Publications,  1967. 
 - 367p. 
<br/><br/><label>ISBN: </label>0486601641 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logical calculation<br/>Symbolic logic
<br/><br/><label>Dewey Class. No.: </label>511.3  / LAN