Shapes 
Britannica 
 - London  Britannica Discovery Library  c2005 
 - 32 p.: col. ill.; 29 cm 
<br/><br/><label>ISBN: </label>159339103X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Teaching aids
<br/><br/><label>Dewey Class. No.: </label>372.7 TIM