Husen Torsten Ed. <br/><br/>
International study of achievement in mathematics 

 - New York  John Wiley          1967 
 - 368p.  cm. 
<br/><br/> International project for the evaluation of educational achievement 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Education<br/>Teaching Techniques
<br/><br/><label>Dewey Class. No.: </label>T:3,(B).1.N6, K7.2