Hassler, Jasper O. <br/><br/>
The teaching of secondary mathematics 

 - New York  Macmillan Company  1930 
 - 405 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ESTUDIO Y ENSEÑANZA<br/>MATEMATICAS
<br/><br/><label>Universal Decimal Class. No.: </label>A/510.0712/H23