Ehlers, Henry <br/><br/>
Logic by way of set theory/ 
Henry Ehlers 
 - New York:  Holt, Rinehart and Winston,  [1968]. 
 - xi, 386 p.:  23 cm. 
<br/><br/><label>LCCN: </label>68020102 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic.
<br/><br/><label>Dewey Class. No.: </label>511.3  / E33l