Geometry in schools / 
edited by Robert Morris. 
 - Paris :  Unesco,  1986 
 - 197 p. :  ill. ;  23 cm. 
 - Studies in mathematics education ;  vol. 5. .
<br/><br/><label>ISBN: </label>923102373x 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geometry--Study and teaching.