Freudenthal, Hans,  1905- <br/><br/>
Weeding and sowing:  preface to a science of mathematical education/ 
Hans Freudenthal. 
 - Dordrecht:  London:  Reidel,  1978. 
 - ix, 315 p.:  ill.;  23 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>9027710724 (pbk) 9027707898 
<br/><br/><label>LCCN: </label>gb 81003234 
<br/><br/><label>Nat. Bib. No.: </label>GB81-3234 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics---Study and teaching<br/>Matemática (Estudo e Ensino)-
<br/><br/><label>Dewey Class. No.: </label>510.7  / F889w