Morris, Robert <br/><br/>
Studies in methematics education. 

 - París :  UNESCO,  1980. 
<br/><br/><label>ISBN: </label>9231201779 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Matemáticas
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Libro
<br/><br/><label>Universal Decimal Class. No.: </label>51