Henkin Leon <br/><br/>
Retracing Elementary mathematics 
Henkin Leon; Smith W. Norman; Varineau Verne J.; Walsh Michael J. 
 -  1962 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>19232 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>B1, K21