Ehilers Henry <br/><br/>
Logic by way of set theory 
Ehilers Henry 
 - N.Y  Holt Rinehart and Winston      1968 
 - xi,386p.  cm. 
<br/><br/><label>Standard No.: </label>17,576 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>R1:(B217), K8 (ER)