Developing thinking in geometry/ 
edited by Sue Johnston-Wilder and John Mason. 
 - London:  The Open University,  c2005. 
 - xii, 270 pages:  illustrations;  24 cm. 
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>1412911680 1412911699 (pbk) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geometry
<br/><br/><label>Dewey Class. No.: </label>DC 516  / D49