Freudenthal H <br/><br/>
Concepts & role of the model in maths & natural & social science 

 -  1963 
<br/><br/><label>Standard No.: </label>119408 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>GENERAL