Ehlers, Henry. <br/><br/>
Logic by way of set theory. 

 - New York :    Holt, Rinehart and Winston,    [1968] 
 - xi, 386 p. ;    23 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Logic.
<br/><br/><label>Dewey Class. No.: </label>MISR RIG 160 EHL