Helmore, G. A. <br/><br/>
Piaget :  a practical consideration / 
a consideration of the general theories and work of Jean Piaget, with an account of a short follow up study of his work on the development of the concept of geometry, by G. A. Helmore 
 - Oxford :  Pergamon Press,  1969 
 - 73 p. :  ill. ;  21 cm. 
<br/><br/>'Books and articles about Jean Piaget and his work: p. 69-72 and p. 73 
<br/><br/><label>ISBN: </label>0080068936 
<br/><br/><label>LCCN: </label>75-094933 
<br/><br/><label>Subjects--Personal Names: </label><br/>Piaget, Jean, 1896 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Child psychology<br/>Geometry concept