Freudenthal, Hans. <br/><br/>
Didactical Phenomenology of Mathematical Structures /  

 - BAoston :   D.Reidel Publishing Company. 
 - x, 595p ;  
<br/><br/><label>ISBN: </label>90-277-1535-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics <Natural Numbers>
<br/><br/><label>Dewey Class. No.: </label>B(T:3)  / M3