Piaget, Jean. <br/><br/>
The child's conception of geometry / 
Jean Piaget. 
 - New York :  Basic books,  c1960. 
 - 411 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geometry-Study and teaching.
<br/><br/><label>LC Class. No.: </label>QA445.5  / .P53